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3 years ago

The average distance between molecules always increases during which of the following phase changes?

Chemistry

1 answer:

vodomira [7]3 years ago

4 0

Answer:

B. liquid to gas

Explanation:

Matter exists in 3 different states:

- Solid: in solids, particles in the substance are tightly bond to each other through strong intermolecular forces. Therefore, they can only vibrate around their fixed position, but they cannot move freely: as a result, the distance between the particles is the smallest among the 3 states of matter.

- Liquid: in a liquid, particles are able to slide past each other, however there are still intermolecular forces keeping them not too far from each other. As a result, in liquids, particles are on average more distance from each other compared to solids.

- Gas: in a gas, particles are completely free to move, as the intermolecular forces between them are negligible. As a result, in gases, the distance between molecules is the greatest, compared with solids and liquids.

Therefore, the phase changes in which the average distance between molecules increases is:

B. liquid to gas

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Balance <br> Na2O+H2O → NaOH

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Answer:
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Step by step exp.
Given:
Equation Na2O+H2O=NaOH
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To balance the equation we have equal number of atom so we multply 2 to the RHS=2NaOH
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3 years ago

The structural level of a protein least affected by a disruption in hydrogen bonding is the

sergeinik [125]

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3 years ago

What is the molality of an aqueous solution containing FeCl3 (MM = 162.2 g/mol) with a mole fraction of FeCl3 of 0.15?

Natalka [10]

Answer:

10 m

Explanation:

The mole fraction of FeCl₃ of 0.15, that is, per mole of solution, there are 0.15 moles of FeCl₃ and 1 - 0.15 = 0.85 moles of water.

The molar mass of water is 18.02 g/mol. The mass corresponding to 0.85 moles is:

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m = 0.15 mol / 0.015 kg

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3 years ago