How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm³ of 6M HCl?

(Mg=24, H=1, Cl=35.5)

1.2 g

0.7 g

0.5 g

0.3 g

0.12 g

Correct answer is C

Mg + 2HCl → MgCl₂ + H₂
6 molar contains 6 Χ 36.5 gms 1000 cc

Solution i.e 6 Χ 36.5/2gms in 500 cc
= 3 Χ 36.5
24 gms of mg will react with 2 Χ 36.5 HCl to liberate 2 gm of hydrogen
∴ 6 gms will liberate 6 Χ 2/24 Χ 1 = 0.5 gm of H₂

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How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm³ of 6M HCl?

(Mg=24, H=1, Cl=35.5)

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How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm3 of 6M HCl? (Mg=24, H=1, Cl=35.5)

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Aptitude Tests

How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm³ of 6M HCl?

(Mg=24, H=1, Cl=35.5)