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QJEEM22Ch9266: JEE Main 2022 Chemistry - Class 11 JEEM22Ch9266 Solution: The moles of methane required to produce 81 g of water after…

The moles of methane required to produce 81 g of water after complete combustion is _____________ ×\times 10 −- 2 mol. [nearest integer]

Step-by-Step Verified Solution

CH4+2O2→CO2+2H2O\mathrm{CH}_4+2 \mathrm{O}_2 \rightarrow \mathrm{CO}_2+2 \mathrm{H}_2 \mathrm{O}

POAC on H\mathrm{H} atom

amp;nCH4×4=nH2O×2amp;nCH4=8118×2×14=8136amp;nCH4=2.25amp;=225×10−2\begin{aligned}&\mathrm{n}_{\mathrm{CH} 4} \times 4=\mathrm{n}_{\mathrm{H} 2 \mathrm{O}} \times 2 \\\\&\mathrm{n}_{\mathrm{CH}_4}=\frac{81}{18} \times 2 \times \frac{1}{4}=\frac{81}{36} \\\\&\mathrm{n}_{\mathrm{CH}_4}=2.25 \\\\&=225 \times 10^{-2}\end{aligned}

Nearest Integers =225=225

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