High School

What mass of hydrochloric acid is needed to completely react with 5.00 moles of zinc in the following reaction?

A. 5.00 g
B. 35.5 g
C. 127 g
D. 71 g

Answer :

Final answer:

The correct mass of hydrochloric acid needed to react with 5.00 moles of zinc is 71 g. so the correct option is d) 71 g

Explanation:

To calculate the mass of hydrochloric acid required to react with 5.00 moles of zinc:

  1. Write the balanced chemical equation: Zn + 2HCl → ZnCl2 + H2
  2. Using the molar ratio from the balanced equation, calculate the molar mass of HCl to find the mass.
  3. 5.00 moles of Zn will react with 71 g of HCl.

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