Question

given the balanced equation representing a reaction: c₂h₅oh(ℓ) + 3o₂(g) → 2co₂(g) + 3h₂o(ℓ) + energy the mole ratio of oxygen molecules to carbon dioxide molecules is 1. 1:2 2. 1:3 3. 3:2 4. 3:3

Explanation:

Step1: Identify coefficients

From the balanced equation \( \text{C}_2\text{H}_5\text{OH}(\ell) + 3\text{O}_2(\text{g})
ightarrow 2\text{CO}_2(\text{g}) + 3\text{H}_2\text{O}(\ell) + \text{energy} \), the coefficient of \( \text{O}_2 \) is 3 and the coefficient of \( \text{CO}_2 \) is 2.

Step2: Determine mole ratio

The mole ratio of \( \text{O}_2 \) to \( \text{CO}_2 \) is the ratio of their coefficients, so \( 3:2 \).

Answer:

1. 3:2