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0.7 of zinc dust containing Zn and ZnO ...

`0.7 ` of zinc dust containing Zn and ZnO when dissolved in dilute `H_(2)SO_(4)` evolved `224 mL` of `H_(2)` at `N.T.P.` Calculate the percentage of zinc in the dust (Atomic mass of `Zn = 65`).

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To solve the problem, we need to calculate the percentage of zinc in the zinc dust sample based on the volume of hydrogen gas evolved when the sample is dissolved in dilute sulfuric acid. Here’s a step-by-step breakdown of the solution: ### Step 1: Understand the reaction When zinc (Zn) and zinc oxide (ZnO) react with dilute sulfuric acid (H₂SO₄), they produce zinc sulfate (ZnSO₄) and hydrogen gas (H₂). The relevant reactions are: 1. Zn + H₂SO₄ → ZnSO₄ + H₂ 2. ZnO + H₂SO₄ → ZnSO₄ + H₂O ### Step 2: Calculate the moles of hydrogen gas produced ...
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