use the unbalanced equation to answer the question.\nc₄h₁₀ + o₂ → co₂ + h₂o\nhow many molecules of o₂ are…

Explanation:

Step1: Balance carbon atoms

There are 4 carbon atoms in $C_4H_{10}$. So, we put a coefficient of 4 in front of $CO_2$: $C_4H_{10}+O_2\rightarrow4CO_2 + H_2O$.

Step2: Balance hydrogen atoms

There are 10 hydrogen atoms in $C_4H_{10}$. So, we put a coefficient of 5 in front of $H_2O$: $C_4H_{10}+O_2\rightarrow4CO_2+5H_2O$.

Step3: Balance oxygen atoms

On the right - hand side, there are $4\times2 + 5\times1=8 + 5 = 13$ oxygen atoms. So, we put a coefficient of $\frac{13}{2}$ in front of $O_2$ to get the balanced equation: $C_4H_{10}+\frac{13}{2}O_2\rightarrow4CO_2 + 5H_2O$. To get whole - number coefficients, we multiply the entire equation by 2: $2C_4H_{10}+13O_2\rightarrow8CO_2 + 10H_2O$.

Answer:

C. 13