Hello guys i wanted to ask if anyone could check my answers please :) 10 points

Which of the following represents a type of change (physical or chemical) that is different from the rest?

Rusting of metal after being exposed to water

Hydrogen and oxygen combine to make steam *

Water vapor condenses to form water droplets

Release of gas when a particular candy is dropped in water

Which of the following is true about the mass of an object?

It is equal to its weight.

It is proportional to its weight.

It is always more than its weight.

It changes at different locations. * like the moon i guess

Which state of matter has neutral particles that bounce off one another as they collide?

Gas*

Liquid

Plasma

Solid

A chemist takes 50-gram sample of sulfur powder that has a melting point of 115.2 °C. What is the melting point of a 100-gram sample of sulfur powder?

115.2 °C since melting point is an extensive property*

115.2 °C since melting point is an intensive property

Double of 115.2 °C since melting point is an intensive property

Double of 115.2 °C since temperature is an extensive property

The first answer is C, condensation is a physical process and the others are chemical.

The second answer is B, it doesn't change depending on location (the answer you chose)

The third answer is A.

The fourth answer is B. Temperature is an intensive property.

No explanations for the ones you got correct.

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AsiaWoerner AsiaWoerner · Answer 2 · 2019-07-22T16:35:02+02:00

Answer:

1) Water vapor condenses to form water droplets: a physical process.

2) It is proportional to its weight.

3) Gas

4) 115.2 °C since melting point is an intensive property

Explanation:

1) rusting of metals involves oxidation which is a chemical process

hydrogen and oxygen undergoes chemical reaction to give water

If a candy is dropped in water and releases gas then there must be some reaction going on,

thus out of the four changes, condensation of water is a physical process.

So correct answer is

Water vapor condenses to form water droplets: a physical process.

2) Mass is independent of location, It will be the same on earth or on moon,Its weight which changes with locations.

Thus the correct answer is mass is proportional to weight.

3) gas particles are neutral and they bounce off on another as they collide. the gas particles are in random motion due to high thermal energy and low intermolecular forces of attractions.

4) The intensive properties does not depend upon the mass or amount of a substance. Melting point is an intensive property and will be the same for any amount of a given substance.