How can i convert 850 cals to joules

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

In a copper wire, a temperature increase is the result of which of the following

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?