Hydrogen gas can be prepared in the laboratory by a sin- gle-displacement reaction in which solid zinc reacts with hydrochloric acid. How mu

Question

Hydrogen gas can be prepared in the laboratory by a sin- gle-displacement reaction in which solid zinc reacts with hydrochloric acid. How much zinc in grams is required to make 14.5 g of hydrogen gas through this reaction

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Ben Gia 6 months 2021-07-15T19:25:50+00:00 1 Answers 9 views 0

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    2021-07-15T19:27:27+00:00

    Answer:

    941 g

    Explanation:

    Step 1: Write the balanced equation

    Zn + 2 HCl ⇒ ZnCl₂ + H₂

    Step 2: Calculate the moles corresponding to 14.5 g of H₂

    The molar mass of H₂ is 1.01 g/mol.

    14.5 g × 1 mol/1.01 g = 14.4 mol

    Step 3: Calculate the number of moles of Zn required to form 14.4 moles of H₂

    The molar ratio of Zn to H₂ is 1:1. The moles of Zn required are 1/1 × 14.4 mol = 14.4 mol.

    Step 4: Calculate the mass corresponding to 14.4 moles of Zn

    The molar mass of Zn is 65.38 g/mol.

    14.4 mol × 65.38 g/mol = 941 g

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