Analyze how elements and compounds in a balanced equation relate to the law of conservation of mass.

Balanced equation is related to the law of conservation of mass as it states that mass can neither be created nor be destroyed in a chemical reaction so the total no. of atoms in a reaction should remain same. in a balanced chemical equation also total no. of atoms of each elements remain same.

i just got this problem. it's 90.3

there is none because earth is stationary and flat.