Answer to Question #170391 in General Chemistry for jack

General Chemistry

Question #170391

What is the mass in grams of H₂ gas produced when 4 moles of HCl is added to an excess of magnesium?

Expert's answer

2HCl+Mg --> MgCl₂+H₂;

m(H₂)= n(HCl)*Mr(H₂)/2= 4*2/2=4 g;

Answer: 4 grams of H₂ are produced

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