If 2.2 liters of gas is inhaled at 18°C and is
heated to 38°C in the
lungs, what is the new
volume of the gas?

To describe a mathematical system that converts weight of water to mass equivalent, the teacher must use the idea of acceleration of gravity. Mass is the amount of matter composed in a substance. Weight is affected by the pull of gravity. Weight is mass multiplied by acceleration of gravity. Gravity acceleration is equal to 9.81 m/s2. So to convert weight to mass, divide the weight by 9.81 m/s2 simply.