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Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2025

ChemistryEasyassertion reason

Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is
Given : Molar mass of Mg is $24 g mol^{- 1}$ .

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Answer:

Solution:

$Mg + 2 HCl \to MgCl_{2} + H_{2}$
Volume $H_{2}$ evolved $= 220 ml$
Mole of $H_{2} = \frac{220 \times 1 0 ^{- 3}}{22.4} =$ mole of Mg used
$∴ Mass of Mg used = \frac{220 \times 1 0 ^{- 3}}{22.4} \times 24 = 235.7 \times 1 0^{- 3} gm = 235.7 mg$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2025

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