Gold has a latent heat fusion of 64.5 J/G. How much energy is required to melt 20.0 G of gold

Which answer lists the fundamental forces in order from strongest to weakest

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?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?