Calculate the density in g/mL of: A piece of metal with a mass of 30 g and a volume of 3 mL
A gas with a volume of 30 mL and a mass of 23 g.

Does the energy in a solid increase or decrease when changing to a liquid?

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

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