Initial mass of ice = 150.89 g Final mass of ice = 99.69 g Initial temperature of water = 42 C Final temperature of water = 0.4 C Calculate the...

1. Calculate the energy necessary to melt 1 g of ice (in kJ). Use the mass of ice.
2. Using the results from this experiment, determine how many kJ are required to melt 1 mole of ice.

I just need help to understand how to do it, this is just an example from an information page, the way that page described it, I did not understand.