Question

1. in the combustion of methane $ch_{4}+2o_{2}\to co_{2}+2h_{2}o$, how many hydrogen atoms are present in the products?

a. 2
b. 8
c. 4
d. 6

Explanation:

Step1: Analyze product formula

The product is $2H_2O$.

Step2: Calculate hydrogen atoms

In one $H_2O$ molecule, there are 2 hydrogen atoms. Since there are 2 $H_2O$ molecules, the number of hydrogen atoms is $2\times2 = 4$.

Answer:

C. 4