Question

How would you balance the following chemical equation:

A) Place a 2 in front of Ca2
B) Place a 2 in front of O2
C) Place a 2 in front of CaO
D) It is already balanced

Answer 1

Ans: C

The amount of products has to equal the amount of reactants

You have 2 Ca’s and 2 O’s on the left, so you need 2 CaOs on the right

Answer 2

A is the correct answer may be wrong