Question:
How many moles of \(\mathrm{CO_2}\) are produced when 4 moles of \(\mathrm{C_2H_6}\) (ethane) combust completely?
Given reaction: \[ 2 \mathrm{C_2H_6} + 7 \mathrm{O_2} \rightarrow 4 \mathrm{CO_2} + 6 \mathrm{H_2O} \]
How many moles of \(\mathrm{CO_2}\) are produced when 4 moles of \(\mathrm{C_2H_6}\) (ethane) combust completely?
Given reaction: \[ 2 \mathrm{C_2H_6} + 7 \mathrm{O_2} \rightarrow 4 \mathrm{CO_2} + 6 \mathrm{H_2O} \]
Show Hint
Use the mole ratio from the balanced chemical equation to find the amount of product formed or reactant consumed.
Updated On: Mar 18, 2026
- 2 moles
- 4 moles
- 6 moles
- 8 moles
Show Solution
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The Correct Option is D
Solution and Explanation
Step 1: From the balanced chemical equation,
\[
2 \text{ moles of } \mathrm{C_2H_6} \rightarrow 4 \text{ moles of } \mathrm{CO_2}
\]
Step 2: Find moles of \(\mathrm{CO_2}\) produced from 4 moles of \(\mathrm{C_2H_6}\):
\[
\text{If } 2 \text{ moles of } \mathrm{C_2H_6} \rightarrow 4 \text{ moles of } \mathrm{CO_2}
\]
\[
\Rightarrow 4 \text{ moles of } \mathrm{C_2H_6} \rightarrow x \text{ moles of } \mathrm{CO_2}
\]
Step 3: Calculate \(x\):
\[
x = \frac{4 \times 4}{2} = 8 \text{ moles}
\]
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