The concentrations of all reactants and products at equilibrium are listed below.
What exactly is equilibrium?Chemical equilibrium is the condition in which there is no net change in the amount of reactants or products during a reversible chemical reaction. The moment the products are produced in a reversible chemical reaction, they begin to interact with the initial reactants.
Equilibrium is characterized as a state of equilibrium or a stable situation in which conflicting forces balance one another out and no changes are taking place. In terms of economics, equilibrium occurs when supply and demand are equal. When you are composed and steady, you are in an equilibrium state.
H 2(g) +I 2(g) ⇌2HI (g)
K c = [HI] 2/[H 2 ][I 2 ] =54.7
⇒[H 2 ][I 2 ]= [HI 2 ] / K c
∵[HI]=0.5 mol litre^ −1 ;
∴[H 2 ][I 2 ]= 54.8[0.5]^2 =4.56×10 −3
If HI is dissociated, there will be an equal concentration of H2 and I2 at equilibrium. Thus,
[H 2 ]=[I 2 ]
⇒[H 2 ] 2=4.56×10 −3
⇒[H 2 ]=0.068 mol litre ^−1
⇒[I 2 ]=0.068 mol litre ^−1
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Question:
At 700 K, the equilibrium constant for the reaction;
H 2(g) +I 2(g) ⇌2HI
(g) is 54.8.If 0.5 mol litre −1 of HI (g) is present at equilibrium at 700 K, what are the concentrations of H 2(g) and I 2(g) assuming that we initially started with HI (g) and allowed it to reach equilibrium at 700 K.
Carbon disulfide (CS2) reacts with excess chlorine (Cl2) to produce carbon tetrachloride (CCl4) and disulfur dichloride (S2Cl2). If 73.5 g of CS2 yields 86.3 g of CCl4, what is the percent yield?
The percent yield is 85.16%
Percent yield is the percent ratio of the weight of the product obtained to the theoretical yield and we calculate the percent yield by dividing the experimental yield by the theoretical yield and multiplying the result by 100 to express the final answer in %
Here given data is carbon disulfide (CS₂) reacts with excess chlorine (Cl₂) to produce carbon tetrachloride (CCl₄) and disulfur dichloride (S₂Cl₂) if 73.5 g of CS₂ yields 86.3 g of CCl₄ means reaction is
CS₂ + Cl₂ → CCl₄ + S₂Cl₂
And here weight are given CS₂ = 73.5 g and CCl₄ = 86.3 g
So, % yield = ratio of the weight
% yield = 73.5 g/86.3 g×100
% yield = 85.16%
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i need help with chemistry equation
Answer:
12.1 grams and 77.8%
Explanation:
(Note: in this answer, sig figs are rounded in the end, not along the way) The molar ratio of calcium sulfate to calcium hydroxide is 1:1
there are 6.56 grams of calcium hydroxide, so the number of moles is the number of grams / the molar mass, which is (6.56 grams) / (74.093 g/mole)
=0.08854 moles of calcium hydroxide
Theoretically, 0.08854 moles of calcium hydroxide would make 0.08854 moles of calcium sulfate.
To find the number of grams of calcium sulfate, multiply the number of moles by the molar mass, which is .08854 * 136.14 = 12.054 grams, or
12.05 grams
The percentage yield of calcium sulfate is just the actual yield / predicted yield, which is 9.37/12.05 which is 0.7776, or 77.8%
How many grams of Fe2O3 can form from 22.4g of O2
74.5 gram of Fe₂O₃ is formed from 22.4 g of O2
The balanced equation of the reaction is
4 Fe + 3 O₂ → 2 Fe₂O₃
4 moles of Fe and 3 moles of O₂ gives 2 moles of Fe₂O₃
Number of moles in 22.4g of O₂ = Given mass / molar mass [Molar mass of O₂ = 32]
= 22.4 / 32
= 0.7 moles
We know that, 3 moles of oxygen form 2 moles of Fe₂O₃
0.7 moles of O₂ form [(2/3) * 0.7] = 0.47 moles of Fe₂O₃
Thus, mass of Fe₂O₃ = number of moles * molar mass [Molar mass of Fe₂O₃ = 159.69]
= 0.47 * 159.69
= 74.5 grams of Fe₂O₃
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what is percentage of volume of a phenol (c6,h5,oh) in a solution containing of 25.5ml of phenol in 495ml of ethanol (ch3,ch2,oh)?
Molecular mass of Phenol = 94 g/mol
Ethanol = 46 g/mol
Weight of Phenol Taken = 25.5 g
Ethanol = 495 g
Total Weight = 495 + 25.5 = 520.5 g
So moles of phenol = 25.5 94 = 0.27
mole of ethanol = 495 / 46 = 10.76
1. Mole fraction of phenol = 0.27 / (10.76 + 0.27) = 0.27 / 11.03 = 0.0244
2. Mass % of phenol = mass of phenol / total mass x 100
25.5 / x 10.5 = 4.9 %
3. Molar concentration of phenol = mol Phenol/mass of solvent (kg)
the solvent is ethanol => Because presents an exceedingly high amount
0.27 / 495 X 1000 m = 0.54m
4. Molarity = moles of phenol/ vol of solution (in liter)
Density of solution = 0.938 g/mL 44
Mass of solution = 520.5 g
Volume of Solution = Mass / Density = 520.5 / 0.938 = 554.9 or 555 ml
Molarity = (0.27 / 555)X 1000 = 0.48 M.
Phenol has unique properties and is not classified as alcohol. They are highly acidic because the aromatic ring is tightly bound to oxygen and the bond between oxygen and hydrogen is relatively loose.
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List four types of observations that indicate when a chemical change has occurred.
Four types of observations that indicates occurring of a chemical change are -
Change in ColorExothermic reaction - Large amount of heat is given offPrecipitation reaction - Precipitate is formedRelease of gas - Gas is given off when chemical change occursWhen a chemical change occurs, color of the product is changed. Chemical change is an irreversible change. It cannot be undone as physical change.
A chemical change is an exothermic reaction. A large amount of heat is released when a chemical change occur. As the product formed in a chemical change is changed in its state, color, etc. which requires a large amount of heat.
Precipitate formation occurs in a chemical change as chemical change occurs in aqueous solution where two ionic bonds combine and forms insoluble salt called precipitate.
A chemical reaction releases off a gas. An example is reaction of baking soda and lemon juice. It releases carbon dioxide gas.
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(02.03 LC)
Which physical evidence supports the evolution of Earth due to deposition?
Concave shape of Wave Rock is the physical evidence that supports the evolution of Earth due to deposition.
Concave shape of Wave RockThe concave shape of Wave Rock is nice physical evidence of deposition in the Earth's evolution. It is a 2.7-billion-year-old land structure that served as the foundation for the formation of the Australian continent.
What is Wave Rock?A naturally occurring rock formation that resembles a tall, breaking ocean wave is called Wave Rock. The "wave" is roughly 110 m (360 ft) long and 15 m (49 ft) tall. It makes up the north side of the isolated hill known as "Hyden Rock."
Since Wave Rock is made of much tougher material from its surroundings, the weathering lowered the surrounding terrain while the bedrock remained to serve as a witness for the past.
The structure of Wave Rock was created by the weathering of the surrounding area, and this is exactly what proves the deposition part. Wave Rock was below the ground because of the deposition of the material around it over time.
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Complete Question
Which physical evidence supports the evolution of Earth due to deposition?
A) Red color of Thor's Hammer
B) Concave shape of Wave Rock
C) Streaks on the face of Wave Rock
D) Broader tip than base of Thor's Hammer
What is the mass of 7.10 moles of magnesium chloride, MgCl₂?
Answer:
675.99 g
Explanation:
1 mole of MgCl2 = 24.31 + 2(35.45) = 95.21 g
so mass of 7.10 moles = 7.10 x 95.21 = 675.991 g or 675.99 g
Investigating Energy Systems
Harnessing Human Energy Chapter 1 Lesson 1.2
Reasoning Tool
Possible subclaims:
The Battery System does have energy.
or
The Battery System does not have energy.
The Hand-Crank Generator System does have energy.
or
The Hand-Crank Generator System does not have energy.
The Solar Cell System does have energy.
or
The Solar Cell System does not have energy.
Evidence
(observations about whether the system does or does not have energy)
This matters because . . .
(How does this evidence support the subclaim?)
Therefore, . . .
(subclaim)
The Possible sub-claim in relation to Investigating Energy Systems is the Solar Cell System does have energy.
Evidence is that -
As the sun shines on a solar panel, energy is captured by the Photovoltaic cells on the panel. This is significant as it generates electrical charges which causes the flow of electricity.
These are accelerated by shifting an internal electrical field within the cell. Therefore, a solar cell system is one that has amount of energy.
A solar cell is also known as a photovoltaic cell. It is an electrical device which uses a natural physical and chemical phenomenon, a photovoltaic effect to convert light energy directly into the electricity.
Solar cells are known as photovoltaic cells. These PV cells converts sunlight directly into electricity. Solar cells produces electricity in remote locations which allows machines to be powered very far from the nearest electrical outlet. Solar cells are reliable and low-maintenance source of renewable energy.
Therefore, A PV cell can reflect and absorb, or pass via light that strikes it. The semiconductor material in PV cell conducts electricity better than an insulator.
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describe how to use Le Chateliers principle to predict the possible ways a chemical system can respond to changes
According to Le Châtelier's principle, if a dynamic equilibrium is disturbed by changing the conditions, the equilibrium position will move to compensate for the change and restore the equilibrium.
What is meant by Le Chatelier's Principle?Le Chatelier's Principle states that "a system at equilibrium will modify itself in such a way to minimize the effect of that change made in it" when external stress is applied by changing concentration, pressure, or temperature.
Change in Concentration:
A + B ⇆ C
In order to counteract the impact of the additional reactant added, the equilibrium will shift forward and produce more product when the concentration of reactants (A or B) is increased. Or it will react in the opposite way if product (C) is added.
Change in Pressure:
A + B ⇆ C
Because there is a decrease in volume at the product side, if pressure is applied to this equilibrium, the equilibrium will shift in the direction of forwarding motion (1 mole as compared to reactants which are 2 moles). If the pressure drops, the opposite situation will be seen.
Change in Temperature:
A + B ⇆ C + Heat
The heat produced in this exothermic reaction (heat is evolved) is on the product side. The equilibrium will shift in the opposite direction as the temperature rises. A drop in temperature will cause the equilibrium to move forward.
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1. What is the [H3O+] of 0.145M HNO2 ? Assume that the Ka=7.2x10^−4 at 25 ∘C .
Express your answer using two significant figures.
2. What is the pH of 0.145M HNO2 ?
Express your answer using two decimal places.
The concentration of the oxonim ion is 0.0099 M while the pH of the solution is 2.
What is the Ka?The term Ka means the acid dissociation constant. This speaks of the extent to which the acid is able to become dissociated in water. We know that is an acid is able to dissociate completely in water then the acid is a strong acid. However, if the acid is not able to dissociate complete in solution then the acid is a weak acid.
We can now set up the ICE table as we would show below;
HNO2(aq) + H2O (l) ⇔ H3O^+(aq) + NO2^-(aq)
I 0.145 0 0
C -x +x +x
E 0.145 - x x x
Ka = 7.2x10^−4
Ka = [H3O^+] [NO2^-]/[ HNO2]
7.2x10^−4 = x^2/0.145 - x
7.2x10^−4(0.145 - x) = x^2
1.044 * 10^-4 - 7.2x10^−4x = x^2
x^2 + 7.2 * 10^-4x - 1.044 * 10^-4 = 0
x=0.0099 M
Then we know that [H3O^+] = [NO2^-]
Thus;
pH = - log( [H3O^+])
pH = - log(0.0099 M)
pH = 2
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which species has 18 electrons
Answer:
Argon - Ar has 18 electrons
An ion that has 18 electrons is a potassium ion.
Hope this helps!
Explanation:
In the following acid-base reaction,H₂PO₄⁻ is theH₂PO₄⁻ (aq) + NH₃ (aq) ---> HPO₄²⁻ (aq) + NH₄⁺ (aq)a) conjugate acidb) acidc) base
Explanation:
H₂PO₄⁻ (aq) + NH₃ (aq) ---> HPO₄²⁻ (aq) + NH₄⁺ (aq)
acid base conjugate base conjugate acid
H₂PO₄⁻ is donating a proton to NH₃. So H₂PO₄⁻ is acting like an acid, and NH₃ is acting as the base. Then, HPO₄²⁻ is the conjugate base of H₂PO₄⁻ and NH₄⁺ is the conjugate acid of NH₃.
Answer: b) acid
Is this the right answer to this question....?
Which of these is an example of active transport?
A: Transport of Na+ from a place of low concentration to a place of higher concentration
Transport of Na+ from a place of low concentration to a place of higher concentration. This is the right answer.
The sodium-potassium pump is the most common and well-known example of active transport. At the cell membrane, the sodium-potassium pump moves 3 sodium ions out of the cell and two potassium ions into the cell per ATP. Examples of active transport include the uptake of glucose in the human intestine and the uptake of minerals and ions into the root hair cells of plants.
One of the greatest examples of active transport is the movement of calcium ions out of cardiomyocytes. Cells secrete proteins such as enzymes, antibodies, and various other peptide hormones. Amino acids are transported across the intestinal mucosa of the human intestine. The movement of ions or molecules across cell membranes to regions of a higher concentration is assisted by enzymes and requires energy.
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I need help with this homework assignment problem
The chemical symbol for the ion will be [tex]Ar^2^+[/tex]
The ion has a total of 16 electrons
The ion has a total of zero 3d electrons
Electron configurationsThe atom in question is a cation with a charge of +2.
The electron configuration goes thus: [tex]1s^2, 2s^2, 2p^6, 3s^2, 3p^4[/tex]
The total number of electrons of the ion of the atom can be calculated as:
2+2+6++2+4 = 16
With a charge of +2, it means two electrons have been lost. The total number of electrons in the atom would be:
16 + 2 = 18.
The symbol of an atom of a neutral element with 18 electrons is Ar. A neutral atom will have an equal number of protons and electrons. The number of protons in an atom is equivalent to the atomic number.
Thus, the atom is Argon with the symbol Ar.
The chemical symbol for the ion would, therefore, be [tex]Ar^2^+[/tex]
From the electron configuration, the ion has no 3d electrons. In other words, there are zero 3d electrons in the ion.
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If you dissolved 54 grams of ammonia in 100 grams of water at 400C would it be considered saturated, unsaturated, or supersaturated? Why?
How many grams of copper(II)sulfate would dissolve in 200g of water at 3○C?
How many grams of ammonia could be dissolved in 50g of water at 150C?
We have the responses as;
1) The solution is unsaturated
2) The solubility is 30 g of copper(II)sulfate
3) The solubility is 100g of ammonia
What is solubility?The term solubility has to do with the amount of solute that can dissolve in solution at a given temperature. Let us recall that a solution is composed of a solute and a solvent. The solvent is the medium wherein the solute is dissolved.
1) Given the fact that the solubility of ammonia in water at 40 degrees Celsius is actually about 300 g/L t the follows that If you dissolved 54 grams of ammonia in 100 grams of water at tat temperature, the solution is regarded as unsaturated.
2) if about 15 g of copper(II)sulfate dissolves in 100 g of water at 3○C
x would dissolve in 200 g of water
x = 15 g * 200 g / 100 g
x = 30 g of copper(II)sulfate
3) About 100g of ammonia could be dissolved in 50g of water at 150C.
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Gannymeade is the largest satellite (moon) in the Solar System, larger than the planet Mercury. Why is Gannymeade classified as a satellite instead of a planet?
Please help.
Ganymede is the largest satellite (moon) in the Solar System, larger than the planet Mercury. Ganymede is classified as a satellite instead of a planet as it orbits a planet, and not the Sun.
One has to directly orbit a star to be a planet, and Ganymede orbits a planet, Jupiter, therefore, it is not a planet but a satellite. Ganymede is a satellite as it has an irregular shaped orbit. Ganymede rotates at a faster speed than Mercury and it is composed of ice at the uppermost layer and beneath that is rock. Ganymede takes about seven Earth-days to orbit the planet Jupiter.Ganymede has a lower density even though it is larger in size. It is larger than the planet Mercury.To learn more about satellites,
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Elizabeth is going to use an electrostatic dust print lifter at a crime scene. What is MOST likely TRUE about her evidence?
A.
It is an impression that is not very deep.
B.
It is buried deep in a carpet on the ground.
C.
It will take up to 24 hours to capture it.
D.
It is a large object that cannot be taken to a lab.
Elizabeth using an electrostatic dust print lifter at a crime scene means her evidence is most likely an impression that is not very deep and is denoted as option A.
What is Evidence?
These refers to the information and happenings which help to prove that something is true and is used in investigations so as to ensure that the culprit is caught.
The electrostatic dust print lifter employs the use of electrostatic adhesion turned on which attracts dust to it and for such to occur, then it means the impression is not very deep which is why it was chosen as the correct choice.
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Answer: A
Explanation:
In the reaction of magnesium nitrate (aq) and sodium hydroxide (aq), the spectator ions are:
Answer:Magnesium nitrate will react with sodium hydroxide to form magnesium hydroxide and sodium nitrate.
Explanation:
Avogadro's number is the number of
Avogadro's number is number of elementary entities (atoms or molecules) comprising one mole of a given substance.
What is the Avogadro's number?Avogadro's number is the number of atoms present in 12 grams of isotopically pure carbon-12, being 6.02214076 × 10²³.
It is the number of elementary entities (atoms or molecules) comprising one mole of a given substance.
The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction.
Therefore, it can be simply said that Avogadro's number is the number of units in one mole of a substance.
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Convert
21 miles/hr to cm/s
Show two digits after decimal.
By converting 21 miles/hr to centimeter we get :
938.784 cm/s
Explanation:Miles per hour is a unit of speed that expresses the distance traveled in miles in one hour. The mile per hour is a customary and imperial unit of speed in the United States. Miles per hour is commonly abbreviated as mph, but it is also abbreviated as mi/h or MPH. 1 mile per hour, for example, can be written as 1 mph, 1 mi/h, or 1 MPH.The following formula can be used to calculate miles per hour:
dmi /thr = vmph
Distance in miles divided by time in hours equals velocity in miles per hour.Steps to convert miles per hour to cm :
Multiply the speed by the conversion ratio to convert a mile per hour measurement to a centimeter per second measurement.Because one mile per hour equals 44.704 centimeters per second, you can convert using this simple formula:44.704 centimeters per second = miles per hourThe speed in centimeters per second is calculated by multiplying the miles per hour by 44.704.To convert 21 miles/hr to cm/s:
21 mph =
= (21 × 44.704)
= 938.784cm/s
21mph is 938.784cm/s
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What does it mean it for a solution to be supersaturated?
O A. The maximum amount of solute has been dissolved.
O B. More solute can still be dissolved in the solvent.
O C. More solute has dissolved than should be possible.
D. The dissolving speed was increased thtough heating.
A solution to be supersaturated means more solute can still be dissolved in the solvent.
What does a solution being supersaturated mean?A solution is said to be supersaturated if it contains more solute than can effectively dissolve at a certain temperature. The injection of a tiny crystal of solute, known as a seed crystal, can start the recrystallization of the excess dissolved solute in a supersaturated solution.
What does saturated vs supersaturated mean?A saturated solution is one that has dissolved the most solute possible at the temperature specified. A supersaturated solution is one that contains more solute than is necessary to reach saturation.
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5.85 gram of sodium chloride (NaCl) is dissolved in 250ml solution. Calculate The mass percentage of the solute?
According to the given statement The mass percentage of the solute is 2.2%.
What does mass percentage mean?As a mass percentage, an element's quantity in a compound or component of a combination can be expressed. The mass percentage is calculated by multiplying this result by 100% after dividing the comparable higher by the masses of each component.
What purposes does mass percentage function?When the mass of a solute and the mass of a solution are known, the concentration of a solution is expressed as a mass percent.
Briefing:A mass percentage is calculated by multiplying the ratio of the solute's mass to the total mass by 100.
5.85/250+5.85*100
=2.2 %
The mass percentage of the solute is 2.2%.
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The rate constant for this first‑order reaction is 0.0960 s−1
at 400 ∘C.
A⟶products
After how many seconds will 11.6%
of the reactant remain?
The time taken for 11.6% of the products to remain is 22.4 s.
What is the rate of reaction?The rate of reaction is the rate at which the reactants are depleted from the system or the rate at which the products appear in the system. Now we have a first order reaction. Recall that the formula of the first order reaction is written as;
ln[A] = -kt + ln[A]o
ln[A] = concertation at time t
t = time taken
k = rate constant
[A]o = initial concentration
Given that;
[A] = 0.116[A]o and k = 0.0960 s−1
Then;
ln0.116[A]o = -0.0960t + ln[A]o
0.0960t = ln[A]o - ln0.116[A]o
0.0960t = ln([A]o/0.116[A]o)
0.0960t = ln(1/0.116)
0.0960t = 2.154
t = 2.154/0.0960
t = 22.4 s
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Sergeant Jeffers likes to use a photo array when he is conducting an investigation. Because of this, what is he MOST likely to do in his current case?
A.
He uses a 35mm camera, a digital camera, and a video camera at the scene.
B.
He takes photos of every piece of evidence before it is sent to the lab.
C.
He has a sketch artist draw the subject based on descriptions.
D.
He asks eyewitnesses to pick out the subject from many options.
He takes photos of every piece of evidence before it is sent to the lab is what Sergeant Jeffers who likes photo array will do in this case and is denoted as option B.
What is Investigation?This is defined as the process in which something is examined and it is usually accompanied with thorough search for facts so as to get accurate and meaningful results.
The use of photo arrays for investigation means that photos of every piece of evidence is taken which is worked on by the professional through series of techniques so as to catch the culprit and ensure justice is served.
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What is the phase of water at 0.25 atm and 0°C?A. SolidB. GasC. Solid and liquidD. Solid and gas
Answer:
A. Solid
Explanation:
We must look for the pressure of 0.25atm on the vertical axis, and the temperature of 0°C on the horizontal axis, like we can see in the following drawing:
Finally, the phase of water is solid.
Fill in the blank.
7.95×10^7 = [?]×10^6
Answer: 79.5
Explanation: Every positive exponent moves the decimal one place to the right. So if you are multiplying by one less decimal to get the same answer your starting number would have to be one place greater to the right.
If your exponents are negative numbers the decimal moves one place per each number to the left. You'll learn that later. Math is a blast! Enjoy it!
Identify the reactants and products,explain what the (aq) and (s) represent in the reaction in the washing machine
In a chemical reaction, usually, we have something very standard, whatever is on the left side of the arrow will be Reactant, and whatever comes after the arrow will be product, so for this reaction:
Na2CO3 (aq) + MgSO4 (aq) -> Na2SO4 (aq) + MgCO3 (s)
The reactants will be: Na2CO3 and MgSO4
The products will be: Na2SO4 and MgCO3
The aq or s representation means the physical state in which the compound will be found in water, if it is aq, this means that the compound will dissolve in water and it will be found in an aqueous state. If the letter is s, therefore the compound will be a solid in water, forming a precipitate.
Since we have a double change in the positions of the elements, this will be called a Double Displacement reaction, in which we have:
AB + CD -> AC + BD
Following the procedure of this experiment, you determined that your 1.000g sample of a fruit drink powder contained 6.04E-5 moles of acidic protons. Of these acidic protons, 2.00E-5 moles were due to VC. The rest were due to an acid H2B in the sample. Calculate: a) Moles of acidic protons due to H2B in the fruit drink sample b) Moles of H2B in the fruit drink sample
a.) 4.04E-5 moles of acidic protons
b.) 2.02E-5 mole of H2B in the fruit drink
What are protons?A proton can be defined as a stable subatomic particle with symbol p , H⁺, or ¹H⁺ that has a positive electric charge of +1 e elementary charge.
The mole with its symbol mol, is the unit of amount of substance in the International System of Units. The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.
The formula for the number of moles formula is expressed as follows;
Number of moles = Mass of substance / Mass of one mole.
n = m/M
from the given above, we have that
mass of sample = 1.00g
a.) Moles of acidic protons due to H2B in the fruit drink sample will be
6.04E-5 moles of acidic protons - 2.00E-5 moles were due to VC
= 4.04E-5 moles of acidic protons.
b.) Moles of H2B in the fruit drink sample = 2.02E-5 mole of H2B in the fruit drink
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Please help I don’t get this
The molar mass of a chemical compound is defined as the mass of the sample divided by the quantity, or number of moles, in the sample, measured in moles. The total grams of Nacl needed to get 0.241 moles exists 14.084 g.
What is meant by Molar mass?The molar mass of a chemical compound is determined by dividing its mass by the quantity of that compound, expressed as the number of moles in the sample, measured in moles. The molar mass of a substance is a bulk attribute rather than a molecular one.
The molar mass of a chemical compound is defined as the mass of the sample divided by the quantity, or number of moles, in the sample, measured in moles.
Molar mass of Nacl = 58.44g
Total grams of Nacl needed to get 0.241 moles = moles number × molar mass
= 0.241 × 58.44
= 14.084 g
Therefore, the total grams of Nacl needed to get 0.241 moles exists 14.084 g.
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Can water stay liquid below zero degrees Celsius?
Water cannot stay liquid below zero degree Celsius (0°C) because it freezes at 0°C.
What is freezing point?Freezing point is the temperature at which a liquid freezes, and the solid and liquid phases are in equilibrium.
Different liquids have different freezing points. Water as a liquid has a freezing point of 0 °C. This means that water in a liquid state will begin to turn solid (ice) at that temperature.
For example;
Ethanol has a freezing point of -114.1 °CMercury has a freezing point of -38.83 °CIn accordance with this question, water cannot stay liquid below a temperature of 0°C because it has a freezing point of 0°C.
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