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3 years ago

If 40.0 g of HCl react with an excess of magnesium metal, what is the theoretical yield of hydrogen?

Chemistry

2 answers:

Bezzdna [24]3 years ago

6 0

Answer is A, 1.11 g .

mamaluj [8]3 years ago

5 0

Balanced equation: Mg+2HCl=MgCl2 + H2
Showing that if Mg is not a limiting factor then 2 moles of HCl on complete reaction liberate 1 mole of Hydrogen
therefore:
1 mole of HCl=35.5g, 40g=x
X= 40/35.5= 1.127mole
2 moles of HCl = 1 moles of Hydrogen
1.127=X
X=1.127/2 = 0.56
the theoretical yield of hydrogen

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