If ammonia is added to the system, the reaction will shift to the right, in favour of the forward direction.
A reaction is said to be at equilibrium when the concentration of reactants is equal to the concentration of the products. This means that the rate at which reactants are forming products is equal to the rate at which products are changed back to reactants.
All reactions at equilibrium follow Le Chatelier's principle, which states that if a chemical system in equilibrium is disturbed by changing the conditions (such as concentration, temperature and pressure changes), the position of equilibrium shifts to the left or to the right in order to counteract the change and to re-establish an equilibrium.
This means that if certain factors in a chemical reaction at equilibrium is changed, the reaction will shift either to the left or to the right. If it shifts to the left, the backward reaction is favoured and more reactants are produces, but if it shifts to the right, the forward reaction is favoured, and more products are produced.
In the question above, ammonia (2NH₃) is added to the chemical system. This will cause an increase in the concentration of ammonia; hence, more ammonia will be converted to nitrogen and hydrogen in order to decrease the concentration of ammonia and re-establish equilibrium. This causes the reaction to shift to the right.
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Particle
Proton
Neutron
Electron
Charge
A =
+1
0
-1
Location
Nucleus
Nucleus
Orbitals
Approximate
mass (amu)
1
1
0
Made of
quarks?
A
B
00
C
Complete the table to summarize the properties of the different subatomic particles by typing in "yes" or
"no."
Charge on neutron, proton and electron is 0,1,-1 respectively, proton and neutrons are in nucleus while electron are in orbitals, the mass of electron is nearly 0 while mass of proton and neutron is 1 amu and only proton and neutrons are made up of quarks.
Electron, neutron and proton, all three are sub-atomic particles.
The charge on Neutron is 0.
The charge on Electron is -1.
The charge on Proton is +1.
Protons and neutrons are found inside the nucleus because they only are forming the nucleus, this is why they are also called Nucleons.
The electrons are found in the orbitals.
Approximate mass of Proton and Neutron is 1 amu. But the electron is very very light as compared to electron. So, we can assume it to be zero.
Protons and Neutrons are made up of Quarks but electron is not made up of quark.
Electron and Quarks are the fundamental particle in an atom.
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at the end of a reaction how much mass is present compared to the start of a reaction (if all products are captured) ?
Answer:At the end of chemical reactions, the total mass of the reatants compared to the total mass of the products - c) the mass is the same. Reason : all chemical reactions follow law of conservation of mass which states that mass of reactants and products remains the same
Explanation:hope this help <3
how does the octet rule explain the formation of a calcium ion? how does the octet rule explain the formation of a calcium ion? by losing two valence electrons from the fourth energy level, calcium achieves an octet in the third energy level so it attains [kr] electron configuration. by gaining two valence electrons into the fourth energy level, calcium achieves an octet in the fourth energy level. by losing two valence electrons from the fourth energy level, calcium achieves an octet in the third energy level so it attains [ne] electron configuration. by losing two valence electrons from the fourth energy level, calcium achieves an octet in the third energy level.
Group 2 of the periodic table places calcium, or Ca, which has two electrons on its outermost shell. Calcium must lose these two outermost electrons, also known as valence electrons, in order to have a full octet. Ionic compounds will be created when calcium reacts with nonmetals.
What is the octet rule rule?The octet rule describes an atom's propensity to prefer eight electrons in its valence shell. Atoms with fewer than eight electrons are more likely to interact with one another and create more stable compounds.Group 2 of the periodic table places calcium, or Ca, which has two electrons on its outermost shell. Calcium must lose these two outermost electrons, also known as valence electrons, in order to have a full octet. Ionic compounds will be created when calcium reacts with nonmetals.Only the main group elements are subject to the octet rule. The octet rule is known to be followed by the molecules of carbon, oxygen, nitrogen, and halogens. The s-block elements are typically among the elements that follow this rule.To learn more about : Octet rule
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HELP MEEEEE IMA FAIL
Calcium has a 2+ charge, and
oxygen has a 2- charge. A
Lewis dot diagram should
contain one calcium atom and
one oxygen atom to show how
these atoms form an ionic
bond.
O True
O False
The statement ,Lewis dot diagram having 1 calcium atom and 1 oxygen atom to form an ionic bond is true.
What is an ionic bond?Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.
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Answer:
A true
Explanation:
The question is in the photo.Which of the following atoms will bond with O in a 1:1 ratio of O and that element:a) Lithiumb) Boronc) Berylliumd) Nitrogen
Which of the following atoms will bond with O in a 1:1 ratio of O and that element:
a) Lithium
b) Boron
c) Beryllium
d) Nitrogen
To solve the problem we have to look for the oxidation states of these elements.
Li: +1 B: +3 Be: +2 N: +5
These compounds will form an oxide with oxygen. The usual oxidation state of oxygen is -2. To form an oxide, we have to combine our element with oxygen and produce a compound with neutral charge.
For example, Li is +1, O is -2, so we have to combine 2 atoms of Li with one atom of O. The formula for the lithium oxide is Li₂O. Similarly we can form the other oxides. We will obtain:
Li₂O B₂O₃ BeO N₂O₅
If we look at the formulas of these oxides, the only one that will bond with O in a 1:1 ratio is Beryllium since its formula is BeO (it has one atom of O and one atom of Be).
Answer: c) Beryllium.
How can you explain the fact that there are different "isotopes" of pennium?
Answer:
A mixture of pre- and post-1982 pennies will represent the naturally occurring mixture of two isotopes of an imaginary element
Explanation:
Since 1982, U.S. pennies have been produced with 97.6% zinc with a thin plating of copper. Since each metal has a different density, pre- and post-1982 pennies have different masses.Different isotopes of an element generally have the same physical and chemical properties because they have the same numbers of protons and electrons.
pls help me with chemistry
just some questions
pls
Answer:
incomplete question need more information
What is the name of the product when you reduced 1-
hydroxy-2-hexanone
with sodium borohydride
(NaBH)?
Answer:
The name of the product on reducing 1-
hydroxy-2-hexanone with sodium borohydride is 1,2 - Dihydroxyhexane
Reduction of carbonyl compounds:
Carbonyl compounds undergo reduction using suitable reducing agent forming alcohols. A number of reducing agents serve this purpose. Some common reducing agents used are:
Sodium borohydrideLithium aluminium hydrideHydrogen in the presence of a catalyst like Platinum or PalladiumWhat is Sodium borohydride?
Sodium borohydride (NaBH4) is a reducing reagent that transforms aldehydes and ketones to their corresponding alcohol.It converts aldehydes to primary alcohol and ketones to secondary alcoholsWe can see that, since the second Carbon on product side has only one hydrogen along with OH group, thus it is a secondary alcohol.
Primary alcohols have 2 hydrogen with the carbon along with hydroxyl group, while tertiary alcohols have no hydrogen on the carbon with hydroxyl group.
Thus we can conclude that the name of the product on reducing 1-hydroxy-2-hexanone with sodium borohydride is 1,2 - Dihydroxyhexane
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on can be described using words, diagrams, numerical information, equations, and graphs. Using
words to describe the motion of objects involves an understanding of such concepts as position,
displacement, distance, rate, speed, velocity, and acceleration.
Vectors vs. Scalars
1. Most of the quantities used to describe motion can be categorized as either vectors or scalars. A
vector is a quantity that is fully described by both magnitude and direction. A scalar is a quantity that is
fully described by magnitude alone. Categorize the following quantities by placing them under one of
the two column headings.
displacement, distance, speed, velocity, acceleration
Scalars
2. A quantity that is ignorant of direction is referred to as a
a. scalar quantity b. vector quantity
3. A quantity that is conscious of direction is referred to as a
a. scalar quantity b. vector quantity
Vectors
Distance vs. Displacement
As an object moves, its location undergoes change. There are two quantities that are used to describe
the changing location. One quantity - distance - accumulates the amount of total change of location
over the course of a motion. Distance is the amount of ground that is covered. The second quantity -
displacement - only concerns itself with the initial and final position of the object. Displacement is
the overall change in position of the object from start to finish and does not concern itself with the
accumulation of distance traveled during the path from start to finish.
1
Distance and speed are scalars while displacement and velocity are vector quantities, scalars are not concerned with direction while vector are conscious with direction.
1. Distance and speed are scalars while displacement and acceleration are vector quantities.
2. The quantity that is ignorant of the direction is referred to as a scalars quantity.
3. A quantity that is conscious with direction is Vector quantity.
Distance vs Displacement,
The displacement is the shortest distance between the final and the initial position of the body while the distance is the actual distance covered by the body.
The displacement has direction from initial to final position, while distance has no direction.
The distance can never be zero while the displacement can be zero, negative or positive.
Negative displacement state that the direction of displacement of the body is in negative direction.
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Which of the following sets of quantum numbers are allowed and which are not allowed? For each incorrect set, select why it is incorrect.
(a) n = 3, ℓ = 3, mℓ = 0, ms = -½
For n = 3, ℓ = 3 is not possible
ms can never be a negative value
mℓ cannot equal -1
All of these quantum numbers are allowed
(b) n = 4, ℓ = 3, mℓ = 2, ms = -½
When n = 4, ℓ = 3 is not possible
ms can never be a negative value
mℓ cannot equal 2 when ℓ = 3
All of these quantum numbers are allowed
(c) n = 4, ℓ = 1, mℓ = 1, ms = +½
When ℓ = 1, mℓ = 1 is not possible
ms can not be positive
mℓ cannot equal 1 when n = 4
All of these quantum numbers are allowed
(d) n = 2, ℓ = 1, mℓ = -1, ms = -1
When n = 2, ℓ = 1 is not possible
ms can never be a negative value
ms cannot equal -1
All of these quantum numbers are allowed
(e) n = 5, ℓ = -4, mℓ = 2, ms = +½
mℓ cannot equal 2
ℓ cannot be a negative number
n has a maximum of four
All of these quantum numbers are allowed
(f) n = 3, ℓ = 1, mℓ = 2, ms = -½
When ℓ = 1, mℓ = 2 is not possible
ms can never be a negative value
ℓ cannot be 1 when n = 3
All of these quantum numbers are allowed
Provided all set of given quantum numbers are allowed.
(a) n = 3, ℓ = 3, mℓ = 0, ms = -½
For n = 3, ℓ = 3 is not possible
ms can never be a negative value
mℓ cannot equal -1
All of these quantum numbers are allowed
(b) n = 4, ℓ = 3, mℓ = 2, ms = -½
When n = 4, ℓ = 3 is not possible
ms can never be a negative value
mℓ cannot equal 2 when ℓ = 3
All of these quantum numbers are allowed
(c) n = 4, ℓ = 1, mℓ = 1, ms = +½
When ℓ = 1, mℓ = 1 is not possible
ms can not be positive
mℓ cannot equal 1 when n = 4
All of these quantum numbers are allowed
(d) n = 2, ℓ = 1, mℓ = -1, ms = -1
When n = 2, ℓ = 1 is not possible
ms can never be a negative value
ms cannot equal -1
All of these quantum numbers are allowed
(e) n = 5, ℓ = -4, mℓ = 2, ms = +½
mℓ cannot equal 2
ℓ cannot be a negative number
n has a maximum of four
All of these quantum numbers are allowed
(f) n = 3, ℓ = 1, mℓ = 2, ms = -½
When ℓ = 1, mℓ = 2 is not possible
ms can never be a negative value
ℓ cannot be 1 when n = 3
All of these quantum numbers are allowed
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Given this equation: N2 + 3 H2 → 2 NH3, how many moles of NH3 can be produced from 3.1 moles of H2?
First, we write down our reaction:
N2 + 3H2 → 2NH3
Don't forget to balance it.
We only use moles as units.
Procedure:
3 x 1 mole H2 ------------ 2 x 1 mole NH3
3.1 moles H2 ------------- x
x = 2.1 moles NH3 are produced
Answer: 2.1 moles NH3
PLEASE HELP, AWARDING BRAINLIEST!
The wavelength in the nanometer is 9.70 E-22.
Wavelength is the distance among equal points (adjacent crests) inside the adjacent cycles of a waveform sign propagated in space or alongside a wire.
The wavelength is the distance between two wave crests, and it is going to be the same for troughs. The frequency is the number of vibrations that pass over a given spot in a single 2d, and it's far measured in cycles according to 2d Hz.
The wavelength of light determines its shade, and the wavelength of sound determines the pitch. The wavelengths of seen light amplify from approximately seven-hundred nm (purple) to 400 nm (violet). The wavelength of audible sound range from approximately 17 mm to 17 m.
E = hc/λ
wavelength (λ) = hc/E
= 6.626 × 10⁻³⁴ × 3 × 10⁸ / 2.05 × 10³ × 1000
= 9.696 × 10⁻³² meter
= 9.696 × 10⁻³² × 10⁹ nm
= 9.696 × 10⁻²² nm
= 9.70 E-22
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3. Write a hypothesis based on observations and scientific principles.
Answer:
An example of a hypothesis based on observation and scientific principles is:
Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.
A hypothesis is an informed prediction or a tentative statement about what you think that would occur in a scientific experiment as a result of experience from observations accepted by scientific rules and law.
A hypothesis is a testable statement obtained from the research question but questions cannot be tested directly, it is the proposed relationship between the variables that are tested.
An example of a hypothesis is:
Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.
This specifies the direction of the hypothesis because one group is faster than the other.
find moles of fe from 392.2 g of fe(nh4)2(so4)2
Answer:
1.381 moles Fe
Explanation:
To find moles of Fe, you need to (1) convert grams Fe(NH₄)₂(SO₄)₂ to moles (using the molar mass) and then (2) convert moles Fe(NH₄)₂(SO₄)₂ to moles Fe (using the mole-to-mole ratio within the molecule). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 4 sig figs like the given value (392.2 = 4 sig figs).
Atomic Mass (Fe): 55.845 g/mol
Atomic Mass (N): 14.007 g/mol
Atomic Mass (H): 1.008 g/mol
Atomic Mass (S): 32.065 g/mol
Atomic Mass (O): 15.999 g/mol
Molar Mass (Fe(NH₄)₂(SO₄)₂):
55.845 g/mol + 2(14.007 g/mol) + 8(1.008 g/mol) + 2(32.065 g/mol) + 8(15.999 g/mol) = 284.045 g/mol
1 mole Fe(NH₄)₂(SO₄)₂ = 1 mole Fe, 2 moles N, 8 moles H, 2 moles S, 8 moles O
392.2 g Fe(NH₄)₂(SO₄)₂ 1 mole 1 mole Fe
----------------------------------- x ------------------- x ---------------------------------- =
284.045 g 1 mole Fe(NH₄)₂(SO₄)₂
= 1.381 moles Fe
at what times should a ph electrode be submerged in a solution? select one or more: when being transferred from storage to a flask when monitoring a reaction in a beaker when being stored in a storage cabinet when not being used between measurements
If we are not using the pH electrode for measurement then it should be submerged in a solution.
What is a pH electrode?
Firstly, we know that the pH of a solution is the negative logarithm of the hydrogen ion concentration of the solution. We know that the more the hydrogen ion concentration of the solution, the owner the pH of the solution.
Having said this, It should be recalled that the measurement of the pH is carried out by the use of the pH electrode. When not being used between measurements, the ph electrode be submerged in a solution.
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write molecular equation (m.e.), ionic equation (i.e.), and net ionic equation (n.i.e.) for each of the following reactions. 1) potassium phosphate with copper (ii) acetate
The molecular, ionic, and net ionic equations of the reaction between potassium phosphate and copper (II) acetate are given below.
The physical states of the substances are depicted in the balanced chemical equation known as a molecular equation, which we may determine using the solubility principles.
When formulae for compounds are expressed as though they were all molecules, the equation is referred to as a molecular equation.
When dissolved ionic chemicals are represented as free ions, the equation is said to be an ionic equation.
A chemical equation known as an ionic equation expresses the electrolytes in aqueous solution as dissociated ions.
A chemical equation known as the net ionic equation shows how ions or molecules change throughout a process.
Net ionic equations lack the common ions that exist on both sides of the ionic equation and are known as spectator ions. In a reaction, ions that do not change at all are known as spectator ions.
Molecular equation:
[tex]2K_3PO_4 (aq) + 3Cu(CH_3COO)_2 (aq) \rightarrow 6K(CH_3COO) (aq) + Cu_3(PO_4)_2 (s)[/tex]
Ionic equation:
[tex]6K^+ (aq) + 2PO_4^{3-} (aq) + 3Cu^{2+} (aq) + 6CH_3COO^- (aq) \rightarrow 6K^+ (aq) + 6CH_3COO^- (aq) + Cu_3(PO_4)_2 (s)[/tex]
Net Ionic equation:
[tex]3Cu^{2+} (aq) + 2PO_4^{3-} (aq) \rightarrow Cu_3(PO_4)_2 (s)[/tex]
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A given sample contains 2.0 g of hydrogen, 33.1 g of sulfur, and 75.01 g of oxygen. What is the total mass of the sample?
Answer: 110.11g
Explanation:
If this is the question then it is as simple as adding up the masses of the different elements.
Mrs. Roberts' class won a day at the bowling alley for their good behavior all year. When they
arrived, jason picked the green ball that weighed 6 lbs, and amanda picked the yellow ball that
weighed 12 lbs. Amanda was having a hard time getting her ball to roll down the lane. Jason was
doing great! he was pushing his ball hard, and it was going straight down the center. He even got
a strike twicel
Amanda’s ball is heavier so it’s harder throw. This was illustrated in the bowling.
How to illustrate the information?Amanda was having such a difficult time because she chose a heavier ball.
Evidence: Jason had no trouble with his 6lb ball, while Amanda struggled with double the weight of Jason's ball, which was 12lb and had more mass.
Reasoning: Jason chose a ball with less mass weighting at 6 pounds, but his ball was more simpler to roll as a result. This was owing to Newton's second law, as having a lighter ball made it easier for him to pass through. Amanda, on the other hand, had a ball that was so heavy that it was difficult to throw.
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a modified ringer’s irrigation has the following formula: sodium chloride 4.6 g potassium chloride 0.2 g calcium chloride 0.43 g peg 3350 25 g water for injection ad 500 ml assuming that 470 ml of water is used in preparing the irrigation, calculate its specific gravity.
The specific gravity of a modified ringer's irrigation is 1.06g/ml
We start by calculating total mass of ingredients:
Total mass of ingredients=4.6+0.2+0.43+25+500
=530.23g
Volume of water=500ml
We now get the density of the solution:
Density=Mass of ingredients/volume of water
=530.23/500
=1.06g/ml
Calculate the specific gravity:
Specific gravity=Density of substance/Density of water
( Density of water=1g/ml)
Specific gravity=1.06/1
=1.06g/ml
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1. True or False: Measuring a chemical property is a nondestructive
process. It will not disturb the composition of your sample.
The answer to the statement " Measuring a chemical property is nondestructive " is true.
Why are chemical properties of substances nondestructive?The chemical properties of substances such as boiling point, melting point, pH, reactivity, combustion, density, flammability, toxicity, solubility or even oxidation states are different characteristics which one can test for in a substance and does not affect the substances themselves in the process.
That being said, when you test for measure a chemical such as from the any of the ones above, it means you want to see or identify or observe the chemical composition of the substance. This won't affect the substance.
For example, when measuring the pH of a substance, that is; measuring the degree of acidity or alkalinity of a substance, it does not affect the substance in the test but reveals to us more about the chemical level or composition of the substance in details.
So therefore, we can now confirm that testing or measuring the chemical features of a substance is harmless to the substance itself.
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Mary thought that the number of frogs in the neighborhood pond had decreased over the last few years. So, she decided to count the number of frogs she saw around the pond twice each day for ten days. Mary's data is displayed in the table below. Day 1 2 3 4 5 6 7 8 9 10 # Frogs at 12 PM 3 2 1 0 1 0 3 2 0 2 # Frogs at 7 PM 15 21 22 13 19 15 20 17 23 18 Based on her observations, which of the following can Mary infer? A. The number of frogs at the pond has steadily increased over the last 2 years. B. Frogs are consumed by predators in the morning and are reborn in the evening. C. The number of frogs at the pond has steadily declined over the last 2 years. D. Frogs rest during the afternoon and become more active in the evening.
Based on her observations, marry infer that Frogs rest during the afternoon and become more active in the evening. option D.
Observations can occur in a lab placing or the herbal world. for example, watching an apple fall from a tree can be a commentary. Noticing that fish only come to a particular part of the river in the early morning is likewise a remark. Smelling garbage decomposing is some other instance of a remark.
The remark is the movement or technique of cautiously looking at a person or something. Careful statement of the motion of the planets. Synonyms looking, have a look at, survey, evaluation more Synonyms of statement.
Observations of a particular setting or state of affairs--this is, take field notes. next, you interpret the notes consistent with the applicable criteria. in the end, you write a nicely prepared paper that presents your observations and interpretations, typically with the goal of answering a research question.
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The question is in the photo✨✨✨(Sorry) In the answer: Please leave all the numbers after the decimal point
36.2L of N2 can be produced.
1st) According to the stoichiometry of the reaction, 2 moles of NaN3 produce 3 moles of N2. Using the molar mass of NaN3 (65.0g/mol ) and N2 (28.0g/mol) we can convert the moles to mass, and we can see that with 130.0g of NaN3 we can produce 84.0g of N2.
Now, we can use a mathematical rule of three to calculate the grams of N2 that can be produced from 71.0g of NaN3:
[tex]\begin{gathered} 130.0gNaN_3-84.0gN_2 \\ 71.0gNaN_3-x=\frac{71.0gNaN_3\cdot84.0gN_2}{130.0gNaN_3} \\ x=45.9gN_2 \end{gathered}[/tex]So, 45.9g of N2 are produced from 71.0g of NaN3.
2nd) It is necessary to convert the grams of N2 produced to moles, so we can use it in the Ideal gas equation:
[tex]\begin{gathered} 28.0gN_2-1mol \\ 45.9gN_2-x=\frac{45.9gN_2\cdot1mol}{28.0gN_2} \\ x=1.6\text{mol} \end{gathered}[/tex]Now we know that 1.6mol of N2 are produced.
3rd) To calculate the volume of N2, it is necessary to use the Ideal gas equation and replace the values of Pressure (P), Temperature (T, in Kelvin) and Number of moles (n):
[tex]\begin{gathered} P\mathrm{}V=n\mathrm{}R\mathrm{}T \\ 1.30\text{atm}\cdot V=1.6\text{mol}\cdot0.082\frac{atm\cdot L}{mol\cdot K}\cdot359K \\ V=\frac{1.6mol\cdot0.082\frac{atm\cdot L}{mol\cdot K}\cdot359K}{1.30\text{atm}} \\ V=36.2L \end{gathered}[/tex]Finally, 36.2L of N2 can be produced from 71.0g of NaN3.
Which of the following statements correctly explains why physical properties of a substance can be used to separate mixtures?
( HELP NEEDED ASAP!!!! )
When substances are mixed together, they retain their physical properties.
Mixtures contain different substances with different properties and chemists can separate one item from the mixture by forcing it to undergo a chemical change.
When substances are mixed together, the mixture assumes the physical properties of each individual substance.
When substances are mixed together, you can see each individual component.
The statements that correctly explains the use of physical properties of a substance to separate mixtures are
Statement 1: When substances are mixed together, they retain their physical properties.
Statement 3: When substances are mixed together, the mixture assumes the physical properties of each individual substance.
Mixtures are compounds that are made up of two or more chemical compounds which are not linked to each other chemically. They can be easily separated as there are no chemical reaction between each other.
Mixtures are compounds that retain their respective physical properties even though they were mixed together as there are no reaction between the two. Thus, these physical properties can be used to separate mixtures. Example: Oil in water. They have different densities. Thus, oil will float on water. We can exploit this physical property and separate them using separating funnel.
Mixtures contain different substances with different properties and chemists cannot separate one item from the mixture by forcing it to undergo a chemical change as there is no chemical reaction.
When substances are mixed together, you can see each individual component. But without knowing their property, we cannot separate them
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How does adding deionized water into a solution containing ions affect the electrical conductivity of the solution?.
Adding deionized water into a solution containing ions will affect the electrical conductivity of the solution because the ions in the solution will be attracted to the water molecules.
Deionized water is water that has had its ions removed. This means that it will not conduct electricity.It will cause the ions to be more spread out in the solution, which will decrease the electrical conductivity of the solution. When deionized water is added to a solution containing ions, the electrical conductivity of the solution will be reduced. The reason for this is that the ions in the solution will be attracted to the water molecules, and this will reduce the number of ions that are available to conduct electricity.
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you are transferring a sample of gas from a hot area to a cooler area assuming that there is no change in pressure and that no gas is lost in the process, what do you expect to happen? g
The Volume of the gas will decrease when a sample of gas from a hot area to a cooler area assuming that there is no change in pressure and that no gas is lost in the process.
The equation of an ideal gas is mentioned below;
PV = nRT
Let us assume that there is no change in pressure and that no gas is lost in the process of gas transfer. So, we can write
Pressure = P = Constant
Number of moles = n = Constant
R = Gas Constant
So, we can write the relation between the temperature and volume of gas as
T ∝ V
We are transferring a sample of gas from a hot area to a cooler area i.e., Temperature is decreasing. So, the Volume of the gas will also decrease.
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Explain why the following statement is trueThe initial number of moles of the unknown acid (HA) is equal to the final amount of the number of moles of the known base (NaOH),
Due to their complete oxidation of one another, the beginning moles of the unknown acid (HA) and the final moles of the known base (NaOH) are equal.
What is oxidation, and give a case?
Summary. An element combining with oxygen is referred to as an oxidation in scientific terminology. For instance, the chemical reaction between oxygen and magnesium metal produces magnesium oxide during the oxidation of magnesium.
What does "oxidation" mean exactly?In order to describe a substance's reaction with oxygen, Antoine Lavoisier coined the term "oxidation." Later, when it was understood that the substance loses electrons when it is oxidized, the definition was expanded to encompass all processes in which electrons are destroyed, regardless of whether oxygen is present.
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Consider the balanced reaction below:
Hint: Tetrafluoromethane, otherwise called carbon tetrafluoride or R−14
, is the most straightforward perfluorocarbon (CF4
). As its IUPAC name shows, tetrafluoromethane is the per fluorinated partner to the hydrocarbon methane. It can likewise be named a haloalkane or halomethane.
Complete step by step answer:
On the off chance that you take a gander at the condition, you will see that for each one mole of C
that is responded, one mole of CF4
is delivered. Thus, 1.46
moles of CF4
are created (expecting that there is sufficient F2
). A mole of CF4
has a mass of around 88
grams, so 1.46
moles is equivalent to 128.48
grams. Adjusted to critical figures, your answer will be 128
grams.
Let’s do it bit by bit:
First Change moles of carbon to moles of CF4
n(CF4)=1.46 mol C × (1 mol CF41 mol C) = 1.46 mol CF4
At that point convert moles of CF4
to grams of CF4
utilizing the molar mass
M(CF4)=(1×12+4×19)gmol−1=88gmol−1
m(CF4)=nM=1.46mol×88gmol−1=128g
So, the required answer is [128g]
the diffusion coefficients for carbon in nickel are given at two temperatures: t (˚c) d (m2/s) 600 5.5 × 10-14 700 3.9 × 10-13 (a) determine the value of d0. enter your answer for part (a) in accordance to the question statement m2/s (use scientific notation.) (b) determine the value of qd. enter your answer for part (b) in accordance to the question statement kj/mol (c) what is the magnitude of d? at 830˚c. enter your answer for part (c) in accordance to the question statement m2/s (use scientific notation.)
Diffusion Coefficient at 600°C
D₁= 5.5*10⁻¹⁴ m²/s
Diffusion Coefficient at 700°C
D₂= 3.9*10⁻¹³ m²/s
D₁= D₀. exp(- Qd/ R.T₁)
D₂= D₀. exp (-Qd/ R.T₂)
We can solve first equation for D₀
D₀= D₁/ exp ( -Qd/ R.T₁)
Put D₀ in equation 2
D₂= D₁. Exp ( Qd/R. (1/T₁ - 1/T₂)
On rearranging the equation we can solve it for Qd:
Qd = R. ㏑( D₂/D₁) (T₁.T₂/ T₂-T₁)
= 8.314. ㏑( 3.9*10⁻¹³/ 5.5*10⁻¹⁴).( 873*973/100)
Qd = 138.3 KJ/mol
Now D₀= D₁/ exp ( -Qd/RT₁)
= 5.5*10⁻¹⁴/ exp (138300/8.314*873)
D₀= 1.04* 10⁻¹⁵ m²/s
For T= 830°C
D= 1.04* 10⁻⁵. exp ( 138300/8.314*1103)
D = 1.04* 10⁻⁵. exp ( 138300/9170.34) m²/s
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The electron configuration of an element is 1s22s22p6. Describe what most likely happens when an atom of this element comes near an atom having seven valence electrons.
Answer: Nothing will happen
Explanation:
Elements want to fill their valence shell with electrons (8).
Referring to both of the table below we will know that the element with that electron configuration is Neon (Ne). It is on the far right side of the periodic table so it contains all 8 electrons in its valence shell. The elements on the right side of the periodic table are called noble gases and are not reactive because they have the maximum number of electrons.
A single electron from the outermost shell of this element will move into the outermost shell of the atom with seven electrons.Nothing will happen in these state.
What is an electronic configuration ?Electron configurations define the arrangement of electrons around an atom's nucleus. Lithium, for instance, contains two electrons in the 1s subshell and one electron in the 2s subshell, according to its electron configuration, 1s22s1.
We may determine that Neon is the element with that electron configuration by looking at both of the tables below (Ne). It has all 8 electrons in its valence shell since it is on the extreme right side of the periodic table.
Noble gases are the elements on the right side of the periodic table that contain the most electrons and are thus non-reactive.
Thus, Electronic configuration an element is 1s22s22p6, it is stable.
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A sample of 11.7 moles of silver bromide is reacted
with 8.6 moles of sodium thiosulfate to produce
sodium silver thiosulfate and sodium bromide. Using
the balanced equation below, predict which is the
limiting reactant and the maximum amount in moles
of sodium bromide that can be produced.
AgBr + 2Na2S2O3 → Na3Ag (S₂03)2 + NaBr
A. sodium thiosulfate, 4.30 moles
B. sodium thiosulfate, 8.60 moles
C. sodium bromide, 5.85 moles
D. sodium bromide, 11.7 moles
Answer:
0.30 moles of sodium thiosulfate formula units are needed to make 0.10 moles of AgBr soluble.
Explanation:
3Na2S2O3 + Ag Br→ NaBr + Nas [Ag(S2O3)3 According to reaction, 1 mole of silver bromide dissolves in 3 moles of Sodium thiosulfate. Then 0.10 moles of AgBr will dissolve with:3/1 x 0.10mol = 0.30mol - 0.30 moles of sodium thiosulfate formula units are needed to make 0.10 moles of AgBr soluble. Hope it will be