Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptLaws of Chemical CalculationsEasy2 minPYQ_2022

ChemistryEasyassertion reason

The moles of methane required to produce $81 g$ of water after complete combustion is____ $\times 10^{- 2} mol$ . [nearest integer]

Answer:

225

Solution:

${CH}_{4} + 2 O_{2} ⟶ {CO}_{2} + 2 H_{2} O$

POAC on H atom

${nCH}_{4} \times 4 = {nH}_{2} O \times 2$

${nCH}_{4} = \frac{81}{18} \times 2 \times \frac{1}{4} = \frac{81}{36}$

${nCH}_{4} = 2.25$

$= 225 \times 10^{- 2}$

Hence, the number of moles of methane is $225 \times 10^{- 2}$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Laws of Chemical Calculations

⏱ 2mℹ️ Source: PYQ_2022

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