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Anuta_ua [19.1K]
4 years ago
9

Which statement accurately describes part of the dissolving process of a polar solute in water? Solute molecules repel water mol

ecules. Water molecules surround solute molecules. Water molecules are strongly attracted to nonpolar substances. Solute molecules remain concentrated in one part of the solvent.
the answer is b
Chemistry
2 answers:
uranmaximum [27]4 years ago
8 0

Its water molecules surround solute molecules

Vedmedyk [2.9K]4 years ago
7 0

Answer: -Water molecules surround solute molecules.

Explanation: The solubility of substances is governed by: Like dissolves like, which states that polar compounds are soluble in polar solvents and non polar compounds are soluble in non polar solvents.

Water being a polar solvent is able to dissolve only polar solutes and not able to dissolve non polar solutes.

The polar solutes when dissolved in water are surrounded by water molecules and due to high dielectric constant of water the polar molecules are separated and thus get dissolved in water.

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Answer:K subscript e q equals StartFraction StartBracket upper C upper O subscript 2 EndBracket StartBracket upper C a upper O EndBracket over StartBracket upper C a upper C upper O subscript 3 EndBracket EndFraction

Explanation: the answer has it's root in Law of mass action which states that; the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients.

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Heat packs are used to relax muscles. Some heat packs contain iron in a small packet. To
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Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. An excess of AgNO3 is present.
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we are given the reaction Cu + 2AgNO3 ---> Cu(NO3)2 + 2Ag. This means for every mole Cu used, there are 2 moles of Ag produced. In this case, given 31.75 g Cu, converting to moles through molar mass and using stoichiometric ratio and the molar mass of Ag, the mass Ag produced is 107.9 grams. 
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3 years ago
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Question 1 A student made measurements on some electrochemical cells and calculated three quantities: The standard reaction free
Zinaida [17]

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Explanation:

for spontaneous reaction,

ΔG is negative

K>1

E > 0

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ΔG and EO suggests that reaction is spontaneous. But K is less than 1.

Hence K is wrong

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ΔG and EO suggests that reaction is non spontaneous .But K is greater than 1.

Hence K is wrong

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4 years ago
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The volume of a gas is 550 mL at 960 mm Hg and 200.0 C. What volume
Masja [62]

Answer:

The volume will be 568.89 mL.

Explanation:

Boyle's law says that "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. That is, the pressure of the gas is directly proportional to its temperature. Gay-Lussac's law can be expressed mathematically as follows:

\frac{P}{T}=k

Where P = pressure, T = temperature, K = Constant

Finally, Charles's law indicates that as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\frac{V}{T}=k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\frac{P*V}{T} =k

Studying an initial state 1 and a final state 2, it is fulfilled:

\frac{P1*V1}{T1} =\frac{P2*V2}{T2}

In this case:

  • P1= 960 mmHg
  • V1= 550 mL
  • T1= 200 C= 473 K (being 0 C=273 K)
  • P2= 830 mmHg
  • V2= ?
  • T2= 150 C= 423 K

Replacing:

\frac{960 mmHg*550 mL}{473K} =\frac{830 mmHg*V2}{423 K}

Solving:

V2=\frac{423 K}{830 mmHg} *\frac{960 mmHg*550 mL}{473K}

V2= 568.9 mL

<u><em>The volume will be 568.89 mL.</em></u>

4 0
3 years ago
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