5
QuizMultiple Choice

Lab: Rate of Chemical Reactions — Unit test

Question 5 • HS Physical Science A - CR Summer School 2026

Which statement best describes balancing equations and the law of conservation of mass?

Answer
A
There are more atoms in the reactants than in the products, and the total mass is the same in the reactants and in the products.
B
The number of atoms is the same in the reactants and in the products, and the total mass is the same in the reactants and in the products.
C
There are fewer atoms in the reactants than in the products, and the total mass is less in the reactants than in the products.
D
There are more atoms in the reactants than in the products, and the total mass is higher in the reactants than in the products.
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Which statement best describes balancing…