Mg metal reacts with HCl to give hydrogen gas. What is minimum weight of HCI required to produce 12g of H2?
Correct answer: C. 438g
- A. 428g
- B. 448g
- C. 438g
- D. 458g
Explanation
Mg + 2HCl => MgCl2 + H2mol. 1mol. 2:1Mr of HCl= 1 + 35.5 = 36.5Mr of H2= 2x1 = 236.5 x 2g HCl required to produce 2g of H2,thus in order to produce 12g of H2 mass of HCl required will be36.5 x12g = 438g
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