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10 December, 03:38

How many formula units make up 22.6 g of magnesium chloride (mgcl2) ?

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Answers (1)
  1. 10 December, 06:03
    0
    Formula Units = 1.42 * 10²³

    Solution:

    Step 1: Calculate Moles using following formula,

    Moles = Mass : M. mass

    As,

    M. mass of MgCl₂ = 95.2 g. mol⁻¹

    Putting values,

    Moles = 22.6 g : 95.2 g. mol⁻¹

    Moles = 0.237 mol

    Step 2: Calculate number of Formula Units using following formula,

    Formula Units = Moles * 6.022 * 10²³

    Putting values,

    Formula Units = 0.237 * 6.022 * 10²³

    Formula Units = 1.42 * 10²³
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