Question

Which chemical reaction is correctly balanced? *

a. CH4 +2O2 → CO2 +2H2O
b. 2CH4 +2O2 → CO2 +2H2O
c. CH4 +O2 → CO2 +H2O
d. None of the above

Answer 1

Which chemical reaction is correctly balanced? *

a. CH4 +2O2 → CO2 +2H2O

b. 2CH4 +2O2 → CO2 +2H2O

c. CH4 +O2 → CO2 +H2O

d. None of the above

Step-by-step explanation:

d none of the above

Answer 2

The answer is a. CH4 + 2O2 --- CO2 + 2H2O

Step-by-step explanation:

A balanced chemical reaction must have the same number of each type of atom on both sides according to the law of conservation of mass:

1 carbon 4 hydrogen + 4 oxygen ----- 1 carbon 2 oxygen + 4 hydrogen

2 oxygen =

1 carbon 4 hydrogen 4 oxygen ---- 1 carbon 4 hydrogen 4 oxygen

Since each type of atom has the same amount on both sides, the chemical formula is balanced.