What mass of zinc (molar mass 65.4 g moll) does it take to produce 0.50 mole of H2(g)?

Question

What mass of zinc (molar mass 65.4 g moll) does it take to produce 0.50 mole of H2(g)?

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Philomena 4 years 2021-07-26T09:35:25+00:00 1 Answers 14 views 0

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  1. ngocdiep
    0
    2021-07-26T09:36:51+00:00
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    Answer:

    32.7 g of Zn

    Explanation:

    We’ll begin by writing the balanced equation for the reaction. This is illustrated below:

    Zn + 2HCl —> ZnCl₂ + H₂

    From the balanced equation above,

    1 mole of Zn reacted to produce 1 mole of H₂

    Next, we shall determine the number of mole of Zn required to produce 0.5 mole of H₂. This can be obtained as follow:

    From the balanced equation above,

    1 mole of Zn reacted to produce 1 mole of H₂.

    Therefore, 0.5 mole of Zn will also react to produce to 0.5 mole of H₂.

    Thus, 0.5 mole of Zn is required.

    Finally, we shall determine the mass of 0.5 mole of Zn. This can be obtained as follow:

    Mole of Zn = 0.5 mole

    Molar mass of Zn = 65.4 g/mol

    Mass of Zn =?

    Mass = mole × molar mass

    Mass of Zn = 0.5 × 65.4

    Mass of Zn = 32.7 g

    Thus, 32.7 g of Zn is required to produce 0.5 mole of H₂.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )