What is the theoretical yield (in mL) at STP of hydrogen gas produced when the 0.040 g of Mg reacted completely?
Correct answer: C. 37 mL
- A. 10 mL
- B. 25 mL
- C. 37 mL
- D. 46 mL
- E. 51 mL
Explanation
The theoretical yield at STP can be found from the chemical equation of the reaction: 0.040 g Mg = x L Mg + 2HCL → MgCl2 + H2 (g) 24.0 g/mol = 22.4 L Solving for x L = 0.037 L or 37 ml
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