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## Answers

**Boyle's law : For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure.**

it means the volume is inverse proportion with pressure. Like if you increase the pressure 10 times its volume with be decrease 10 times.

The mathematical expression is

**PV=constant.**

**Charles' Law : For a fixed mass of gas at constant pressure, the volume is directly proportional to the kelvin temperature**.

if you twice the kelvin heat from, like to 200 K to 400 K, the volume of a secure mass of the gas will twice over too.

The mathematical expression is

**V = constant x T.**