Asubstance spontaneously explodes when exposed to other substances.
is this a chemical or physical reaction

What is the atomic number of an atom that has 6 protons

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?

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5