A statement of the first law of thermodynamics is that:

A. the total energy of the universe is constant.
B. in a spontaneous process, the entropy of the universe increases.
C. the total energy of the universe is always decreasing.
D. mass and energy are conserved in all chemical reactions.
E. there is no disorder in a perfect crystal at 0 K.

Option A) the total energy of the universe is constant.

Explanation:

The first law of thermodynamics is also known as the law of conservation of mass.

And it states that matter is neither created nor destroyed during a chemical reaction but changes from one form to another.

Thus, the total energy of the universe is constant (neither created nor destroyed).

the answer is na (sodium)