Conservation in Chemical Reactions Quick Check

Question

Science 8 Q1 / Matter Interactions

In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)
Responses

A. Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H 2 + ZnCl 2

B. CH4 + O2 → CO2 + 2H2O
CH 4 + O 2 → CO 2 + 2H 2 O

C. Li2CO3 → LiO + CO2
Li 2 CO 3 → LiO + CO 2

D. CO2 + H2O → CH2OH + O2

Answer 1

B. CH4 + O2 → CO2 + 2H2O
In this chemical equation, the number of atoms in the reactants (5 carbon atoms and 4 oxygen atoms) is the same as the number of atoms in the products (1 carbon atom and 4 oxygen atoms).