Why does increasing the temperature of the reactants increase the rate of a chemical reaction?

Idon’t understand this page, can someone ?

According to the tide table below what time of day will the highest tide occur?

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?