Because the Law of Conservation of Matter states that matter cannot be created or destroyed, in a chemical equation -

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

If 16.00g of hydrogen gas reacts with 126.73g of oxygen, how many grams of water are yielded? (both reactants are completely consumed in the reaction.)