Question

question 5 (1 point) the coefficient of o2 in the balanced version of ch4 + o2 → co2 + h2o is 1 2 3 4

Explanation:

Step1: Balance the chemical equation

The un - balanced equation is $CH_4 + O_2
ightarrow CO_2+H_2O$. First, balance the carbon atoms. Since there is 1 carbon atom in $CH_4$, there is 1 $CO_2$ on the product side. Then balance the hydrogen atoms. There are 4 hydrogen atoms in $CH_4$, so we need 2 $H_2O$ molecules on the product side to balance the hydrogen. The equation becomes $CH_4 + O_2
ightarrow CO_2 + 2H_2O$. Now, balance the oxygen atoms. On the product side, there are 4 oxygen atoms (2 in $CO_2$ and 2 in 2$H_2O$), so we need 2 $O_2$ molecules on the reactant side. The balanced equation is $CH_4+2O_2
ightarrow CO_2 + 2H_2O$.

Answer:

2