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. (A) 236 mg (B) 0.24 mg (C) 2.444 g (D) 235.7 g

Question

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.

(A) 236 mg
(B) 0.24 mg
(C) 2.444 g
(D) 235.7 g

Prashant Kotian · Accepted Answer

Correct answer: A. Mg + 2HCl  MgCl2 + H2(g)     220 excess     220 Mass of Mg =       220 × 24 = 40.236 gram = 236 mg

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