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18 August, 15:48

Calculate the mass % of magnesium sulfate (assume that there is a 1:1 mol ratio between sulfate and magnesium sulfate) in the original sample. Report your answer without units and use 3 sig figs, i. e. 55.23543% would be entered as 55.2

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  1. 18 August, 15:57
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    61.8 % is the mass percentage of magnesium sulphate.

    Explanation:

    The mass percent of individual solute or ion in a compound is calculated by the formula:

    Grams of solute : grams of solute + solvent * 100

    mass percent of magnesium is calculated as 1 mole of magnesium having 24.305 grams/mole will have weight of 24.305 grams and 1 mole of MgSO4 will have 120.366 grams

    Putting the values in the equation:

    24.305 : 144.671 * 100

    = 16.8% of magnesium is in the mixture

    The mass percentage of SO4 is calculated as

    = 96.06 : 216.426 * 100

    = 44.38 %

    The mass percentage of the mixture MgSO4 is 44.38 + 16.8 = 61.8 %

    Mass percentage is a representation of the concentration of element or elements in a compound.
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