According to the law of
conservation of mass, if two
atoms, with atomic masses of 2
amu and 5 amu were combined
in a chemical reaction, what
would be the mass of the final
product?
a. 7 amu
b. 10 amu
c. 16 amu

A) 7 AMU

Explanation:

The Law of Conservation of mass states that during a reaction mass is neither gained nor lost. So by reacting the two products together, the final mass should be the addition of their two constituent masses (2 and 5)