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Answer in General Chemistry for mari #152234

Author:
March 17th, 2023

Cu2Mg + 2HCl → MgCl2 + H2 + 2Cu

At STP 1 mole of gas occupies 22.4 L.

Proportion 1:

1 mol – 22.4 L

x – 1.12 L

“x = frac{1 times 1.12}{22.4} = 0.05 ;mol”

n(Cu2Mg) = n(H2) = 0.05 mol

MM(Cu2Mg) = 151.39 g/mol

m(Cu2Mg) “= 0.05 times 151.39 = 7.57 ;g”

Proportion 2:

7.57 g – 100 %

3 g – y

“y = frac{3 times 100}{7.57} = 39.63” %

Answer: 39.63 %

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