If 6.5g of magnesium ribbon reacts completely with Hydrochloric acid, how many grams of hydrogen gas would be liberated?
Mg(s) + 2 HCl(aq) –> MgCl 2(aq) + H 2(g)
[ H = 1.0, Mg = 24.0 ]
-
0.54g
- 0.70g
- 1.08g
- 1.40g
The correct answer is: A
Explanation
24g of Mg will liberate 2g of H
: 6.5g of Mg will liberate Xg of H
= ( 6.5 X 2 ) / 24
= 0.5416g of Hygrogen ( H )