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13 March, 10:37

If 2.00 g of N2 occupies 1.25 L space, how many moles of N2

have a volume of 25.0 L? Assume temperature and pressure

stayed constant.

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Answers (1)
  1. 13 March, 13:45
    0
    n₂ = 1.4 mol

    Explanation:

    Given dа ta:

    Mass of nitrogen = 2 g

    Initial Volume occupy by nitrogen = 1.25 L

    Final volume occupy by nitrogen = 25.0 L

    Final number of moles = ?

    Solution;

    Formula:

    V₁ / n₁ = V₂ / n₂

    Number of moles of nitrogen:

    Number of moles = mass / molar mass

    Number of moles = 2 g / 28 g/mol

    Number of moles = 0.07 mol

    Now we will put the values in formula:

    V₁ / n₁ = V₂ / n₂

    n₂ = V₂ * n₁ / V₁

    n₂ = 25 L * 0.07 mol / 1.25 L

    n₂ = 1.75 L. mol / 1.25 L

    n₂ = 1.4 mol
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