The boiling point of a substance is affected by
a.
the mass of the substance.
b.
the substance’s volume.
c.
the pressure of the air above the substance.
d.
the weight of the substance.

Option (c) is the correct answer.

Explanation:

Boiling point is defined as the temperature at which vapor pressure of a liquid substance becomes equal to the atmospheric pressure.

Boiling point of a substance is not affected by mass of the substance, its volume or weight.

But boiling point of the substance is only affected by pressure of the air above the substance. As higher is the pressure of air above the substance more will be its boiling point.

Thus, we can conclude that the boiling point of a substance is affected by the pressure of the air above the substance.

explanation:

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