Question

Which coefficients correctly balance the formula equation CaCo3(s) CaCo3+CO2(g)? a. 1, 1, 1 c. 2, 6, 3 b. 1, 3, 1 d. 3, 1, 2

Answer 1

Answer: option a: 1,1,1

Explanation:

1) The chemical equation given is wrong.  This is the right chemical equation

CaCO3(s) → CaO(s) + CO2(g)?

2) To balance you start by counting the number of atoms of each element on both sides

element                              number of atoms                   conclusion
                                  reactant side         product side

Ca                                      1                        1                    balanced

C                                        1                        1                    balanced

O                                        3                       1+2 = 3           balanced

3) Therefore all the elements are balanced and the coefficients are 1, 1, and 1.