Determine the density of a substance that weighs 640 grams and occupies a volume of 1 cube it has 4 cm edge

When balancing a chemical equation:

In one or two grammatically correct sentences, write a definition for the term molecule geometry

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?