4 As water and sulfuric acid are mixed together the temperature of the mixture becomes very hot. Select the statements
that best describe why this happens. Assume that both substances start out at room temperature and there is no
external heat source affecting them.
AA chemical reaction is occurring.
Energy is released during the chemical reaction.
C Energy is absorbed during the chemical reaction.
D No chemical reaction occurs because water is inert.
E The lack of a chemical reaction causes the temperature to increase.

A chemical reaction is occurring and energy is released.

Explanation:

Heat is released when you combine a strong acid with water, considered exothermic. That's why it's extremely important to add the acid to a large volume of water; not vice versa.

the atomic mass is the bottom number on the element.

-steel jelly

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.