OnlineCBT
Chemistry · Some Basic Concepts of Chemistry
हिन्दीAccording to the balanced chemical equation for the combustion of methane: \( \text{CH}_4(\text{g}) + 2\text{O}_2(\text{g}) \rightarrow \text{CO}_2(\text{g}) + 2\text{H}_2\text{O}(\text{g}) \), what mass of dioxygen is required to react completely with \( 32\text{ g} \) of methane?
Correct answer · Option 3
\( 128\text{ g} \)
Explanation
\( 16\text{ g} \) of \( \text{CH}_4 \) reacts with \( 2 \times 32 = 64\text{ g} \) of \( \text{O}_2 \). Therefore, \( 32\text{ g} \) of \( \text{CH}_4 \) reacts with \( \frac{64}{16} \times 32 = 128\text{ g} \) of \( \text{O}_2 \).
