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Объяснение:
40 г Х г Х л
2CH3COOH + Mg = (CH3COO)2Mg + H2
n=1 моль n=1 моль
М = 24 г/моль М = 2 г/моль Vm=22,4 л/моль
m=24 г m=2 г V = 22,4 л
40 г Mg - Х г Н2
24 г Mg - 2 г Н2
m(H2) = 40 * 2 / 24 =3,33 г
40 г Mg - Х л Н2
24 г Mg - 22,4 л Н2
V(H2) = 40 * 22,4 / 24 =37 л