Ok, i need major help

whats 6+23=

What type of matter is made of only one kind of atom

How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?

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?