What volume of 3.00 M HCl in liters is needed to react completely (with nothing left over) with 0.750 L of 0.100 M Na2CO3?
Answer:
0.0500L of 3.00M HCl are needed to react completely
Explanation:
Hydrochloric acid HCl reacts with sodium carbonate, Na2CO3, as follows:
2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂
Where 2 moles of HCl reacts per mole of Na₂CO₃
To find the volume of 3.00M HCl needed to react completely we need first to calculate the moles of Na₂CO₃ added and, with this chemical equation we can solve for moles of HCl as follows:
Moles Na₂CO₃:
0.750L * (0.100moles Na₂CO₃ / L) = 0.0750moles
Moles HCl:
0.0750moles Na₂CO₃ * (2 moles HCl / 1 mole of Na₂CO₃) = 0.150 moles of HCl
Volume of 3.00M HCl:
0.150 moles of HCl * (1L / 3.00moles) =
0.0500L of 3.00M HCl are needed to react completelyWhat is an nucleus ?
Nucleus is present at the centre of atom. It contains protons and neutrons. It is very small as compared to the atom.
Answer:
It is a part of a cell which controls all the activities in the cells and contains the genetic information of the cell that is to be passed down to the next cell when it reproduces.
Explanation:
It is a part of a cell which controls all the activities in the cells and contains the genetic information of the cell that is to be passed down to the next cell when it reproduces.
In the ground state, an atom of which element has seven valence
electrons?
1.
sodium
2.
phosphorus
3.
nitrogen
4.
fluorine
Answer:
Fluorine
Explanation:
Fluorine has 9 total electrons. The first two are in the 1s level, and the remaining electrons are on the outer level of the atom, with 2 in the s level and 5 in the p level. The electron configuration is 1s2 2s2 2p5.
Based on the graph of US population and steel consumption, what could have led to the increase in steel consumption seen
on the graph?
Whenever the population has increased, steel consumption has increased as well
A larger population consumes greater amounts of fossil fuels like steel
When the population first started to increase, there was a need for much more construction
Steel consumption increased when people started to use computers.
Answer:
A. Whenever the population has increased, steel consumption has increased as well.
Explanation:
Based on the graph of US population and steel consumption, what could have led to the increase in steel consumption seen on the graph is that whenever the population has increased, steel consumption has increased as well.
A critical look at the graph, you will discover that the population and the steel consumption are moving upwards (i.e they are increasing). It's seen that as the population increases, steel consumption increases. This is true because as the population increases, people are building houses, more transportation systems that require steel are being manufactured, more household utensils that are steel products are being fabricated etc; therefore the consumption of steel increases.
Which electron configuration shows an atom with 6 valence electrons?
Answer:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom.example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
) How many moles are there in 2.00 x 10^19 molecules of calcium phosphate?
Answer:
[tex] \huge 3.322 \times {10}^{ - 5} \: \: moles \\ [/tex]
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{2.00 \times {10}^{19} }{6.02 \times {10}^{23} } \\ \\ = 3.322 \times {10}^{ - 5} \: \: moles[/tex]
Hope this helps you
Which of the following does not represent an aspect of an environmentally
sustainable society?
Answer:A = $90
B = $390
Explanation:
The aspect of the environmentally sustainable society has not been soil erosion.
An environmentally sustainable society has been the one that has been able to meet the current and future needs of the generation. The plantation of trees, reducing the greenhouse effect, and the method for the generation of a sustainable environment has been the characteristic of a sustainable society.
The soil erosion results in damage to the soil with the flow of the upper layer of soil from the water flow. The soil erosion will be resultant in damage to the environmentally sustainable society.
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Why is it possible for an active metal like aluminum to be useful as a structural metal?
Answer:
Aluminum even after being an active metal is used as a structural metal due to its toughness, high strength, lightweight, and resistance to the process of corrosion. It is resistant to corrosion as its reactivity gets suppressed due to the formation of an aluminum oxide film which is protective in nature, on its surface. Passivation is the term for the formation of the protective coating.
Which particle has the least mass? Proton, a helium atom, electron, hydrogen atom
Answer:electron
Explanation:
Renewable resources can be replenished in a short period of time. true or false
Answer:
they can be over a short period of time. so true
Explanation:
Please rank the following atoms from smallest to largest: Ge, P, O
A student made the Lewis dot diagram of a compound as shown.
What is the error in the Lewis dot diagram?
A. The Ca atom should transfer only one electron to Ci because the formula is CaCi.
B. The number of dots around Ca should be one because Ca has to transfer only one electron to CI.
C. The Ca atom should transfer only one electron to CI, and the second electron should be transferred to another CI atom.
D. The CI atom should transfer two electrons to Ca because it has more electrons than Ca, so formula becomes CaCI*2
Answer:The Cl atom should transfer two electrons to Ca because it has more electrons
than Ca, so the formula becomes CaCl2.
Explanation: i took the quiz
Calcium forms ionic compound with two chlorine atoms as CaCl₂. Hence, Ca atom should transfer only one electron to one chlorine and the second electron is given to second Cl. Thus, option C is correct.
What is ionic bond?Ionic bond is formed between a metal and non metal by losing electron from the metal. The non metal should be an electronegative atom to accept that electron and forms a negative charge.
While the metal forms a partial positive charge. This charge separation make them attractive each other and make it ionic.
Ca is a second group element have two valence electrons. Ca forms compounds with halogens by donating its two electrons each to two halogen atoms and make a dihalide.
Cl have 7 electrons and tends to accept one electron from the metal to complete its octet. Thus one chlorine need only one electron from Ca. The second electron is then transferred to a second chlorine atom.
Therefore, the CaCl₂ compound is formed by transferring two electrons from calcium into two chlorine atom. Hence, option C ic correct.
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#SPJ2
why is more dew formed on a grass and not on polished metal surface
Answer
Incidentally, they all form dew but because grass is closer to the soil, which maintains heat longer than the air where tree leaves are found, you will find more condensation in that region. Also, higher up the wind and sun will allow faster evaporation which makes the dew less noticable on tree leaves.
Explanation:
Preferred objects of dew formation are thus poor conducting or well isolated from the ground, and non-metallic, while shiny metal coated surfaces are poor infrared radiators. ... If the wet soil beneath is the major source of vapor, however (this type of dew formation is called distillation), wind always seems adverse.
Aqueous solutions of lithium hydroxide (LiOH) and acetic acid (HC2H3O2) will react to yield lithium acetate and water. In the balanced equation for this reaction, what is the lowest possible whole number coefficient for water?
Answer: The lowest possible whole number coefficient for water is 1.
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble water and remain in solid form are represented by (s) after their chemical formulas.
The balanced chemical reation for aqueous solutions of lithium hydroxide and acetic acid react to yield lithium acetate and water is:
[tex] LiOH(aq)+CH_3COOH(aq)\rightarrow CH_3COOLi(aq)+H_2O(l)[/tex]
Thus the lowest possible whole number coefficient for water is 1.
In the balanced equation for given reaction, the lowest possible whole number coefficient for water is one.
What is the stoichiometry?Stoichiometry of any reaction will tells about the relative amount of species presents before and after the chemical reaction.
Reaction between the lithium hydroxide and acetic acid is a neutralization reaction, as here lithium hydroxide is a base and acetic acid is a acid as a result of which it produces water molecule and lithium salt of acetate. And balanced equation for this will be represented as:
LiOH(aq) + CH₃COOH(aq) CH₃COOLi(aq) + H₂O(l)
In the above equation all entities are present in equal amounts on both the sides and from the stoichiometry of the reaction it is clear that coefficient of water is 1.
Hence, 1 is the whole number coefficient for water.
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100
80
100 mL
water vapor
Which statement describes what will happen if a student pushes the plunger
to compress the water vapor?
A. The total number of water particles will increase.
B. The amount of energy in the water particles will decrease.
C. The amount of empty space between the water particles will
decrease
D. The total volume of the water particles will increase
I will mark brainliest
Answer:
Explanation:it is c
Answer:
C The amount of empty space between the water particles will decrease
Explanation:
I just took the quiz, have a nice day!
The noble-gas notation for the element indium, (In, atomic #49) is:
A.
?
[Kr]5p?
B.
?
[KrJ5524d105p
C.
?
[Kr]5s25d 105p1
D. ?
[Kr]5524f1450 105p1
Answer:[tex][Kr]4d^{10}5s^25p^1[/tex]
Explanation:
The element Indium with atomic number 49 will have 49 protons and 49 electrons in it.
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom. The electrons are filled according to Afbau's rule in order of increasing energies and the nearest noble gas is Krypton with 36 electrons.
The electronic configuration in terms of noble gas configuration is:
[tex]In:49:[Kr]4d^{10}5s^25p^1[/tex]
The noble-gas notation for the element indium is [Kr} 4d¹⁰5s²5p¹. The correct option is B. [Kr] 5s2 4d10 5p1
From the question,
We are to write the electron configuration of the element Indium, using the appropriate noble gas notation.
The noble gas that comes before Indium (In) is Krypton (Kr). Therefore, the noble gas that will be used in the notation is Krypton.
Indium has an atomic number of 49 while Krypton has an atomic number of 36. This means we will fill in 13 more electrons.
The electron configuration for the element indium using the noble-gas notation is
[Kr} 4d¹⁰5s²5p¹
Hence, the noble-gas notation for the element indium is [Kr} 4d¹⁰5s²5p¹. The correct option is B. [Kr] 5s2 4d10 5p1
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Determine the molarity of a solution formed by dissolving 4.83 moles of NaCl (M=58.44 g/mol) in enough water to yield 2.16L of solution. round to three sig figs. do not include units.
The molarity of a solution : 2.24
Further explanationMolarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
Where
M = Molarity
n = number of moles of solute
V = Volume of solution (L)
4.83 moles of NaCl in 2.16 L solution
n = 4.83
V = 2.16 L
Molarity :
[tex]\tt M=\dfrac{4.83}{2.16}=2.2361\rightarrow 3~sig~figs=2.24[/tex]
Which property of an ice cube will stay the same after the ice cube is melted?
A. Shape
B. Physical state
C. Mass
D. Texture
Answer:
C. Mass
Explanation:
The air in a syringe has volume 25.0 mL
when the pressure is 4.38 atm. What will be
its volume when the pressure is 0.65 atm?
Answer:
168.46 mLExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{25 \times 4.38}{0.65} = \frac{109.5}{0.65} \\ = 168.46153...[/tex]
We have the final answer as
168.46 mLHope this helps you
is this right or wrong ? pls help rn
your answer is correct good luckk!!!:)
A radiometer is shown below. When infrared light passes through the radiometer
Select the correct answer.
Which equation correctly relates kinetic energy, mass, and velocity?
OA. KE=3m22
OB. KE = mv2
Oc. KE=mu
OD. KE = mv3
Answer:
Ke1/2mv2
Explanation:
Hope this helps
Answer:
KE 1/2 MV2
ExplanationExplanationExplanationExplanation: hope this helps
Explain why the electron configuration of 2-3-1 represents an atom in an excited state.
Answer:
The excited state electron configuration of an atom indicates the promotion of a valence electron to a higher energy state.
What element has the noble-gas notation [Ne]3s23p5?
A.
?
Chlorine
B.
?
Sulfur
C.
?
Argon
D. ?
Phosphorus
Answer:
Chlorine
Explanation:
I will mark Brainist if someone can answer
Complete the following for the chemical formula: 5Ba(OH)2
Number of elements= ?
Number of subscripts= ?
Number of of atoms= ?
What is the coefficient?
A. 1
B. 3
C. 5
D. 15
Answer:
Number of elements= 2
Number of subscripts= 1
Number of of atoms= 5
What is the coefficient? - C. 5
What is crystallization
Explanation: Crystallization or crystallization is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal.
HOPE THIS HELPS!!!! :)
Which of the following processes occurs when wind and water move weathered and eroded pieces away from rock? *
A. Cementation
B: Deposition
C: Transportation
D: Consolidation
Answer:
lemme guess is it transportation??
BRAINLIEST PLUS 25 POINTS
The particles of a substance stay close together but slide past one another as they move. When thermal energy is removed from the substance, the particles are forced into fixed positions by their attraction to one another. What change in state has occurred?
A: Gas to solid
B: Liquid to solid
C: Gas to liquid
D: Solid to liquid
Answer:
D
Explanation:
Answer: B
Explanation:
liquid to solid
Which molecule/molecular compound is joined by a single covalent bond? O2 or N2 or Br2 or CO2?
What are two basics ingredients for making ganache?