how many moles of o2 are required to generate 12 moles so2 gas?\n2cufes2 + 5o2 → 2cu + 2feo + 4so2\n? mol o2

Answer:

15

Explanation:

Step1: Identify mole - ratio

From the balanced equation $2CuFeS_{2}+5O_{2}\rightarrow2Cu + 2FeO+4SO_{2}$, the mole - ratio of $O_{2}$ to $SO_{2}$ is $\frac{n_{O_{2}}}{n_{SO_{2}}}=\frac{5}{4}$.

Step2: Set up proportion

Let $x$ be the moles of $O_{2}$ required to produce 12 moles of $SO_{2}$. Then $\frac{x}{12}=\frac{5}{4}$.

Step3: Solve for $x$

Cross - multiply: $4x = 12\times5$. So $4x=60$, and $x = 15$ moles.