in the experiment water was added to convert the small amount of magnesium nitride (Mg3N2) produced into magnesium oxide (MgO). suppose this step was skipped so that the solid magnesium nitride impurity was allowed to remain in the product, and the product was analyzed as if it were pure magnesium oxide (MgO). In the erroneous approach, would the determined mass percent of magnesium in magnesium oxide be higher or lower than the true value? you need to provide a reason for your answer to receive credit.

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Asked Oct 8, 2019
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in the experiment water was added to convert the small amount of magnesium nitride (Mg3N2) produced into magnesium oxide (MgO). suppose this step was skipped so that the solid magnesium nitride impurity was allowed to remain in the product, and the product was analyzed as if it were pure magnesium oxide (MgO). In the erroneous approach, would the determined mass percent of magnesium in magnesium oxide be higher or lower than the true value? you need to provide a reason for your answer to receive credit.

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Expert Answer

Step 1

The term mass percentage is a method to represent the concentration of the elements in a given compound or the components of a given mixture.

Step 2

The mass % of Mg in MgO can be calculated as follows:

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Mass percent of Mg=_Molar mass of Mg x100 Molar mass of MgO 24 g/mol100 40 g/mol -60%

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Step 3

The mass % of Mg in Mg3N2 can be calcu...

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Mass percent of Mg=3XMolar mass of Mgx100 Molar mass of Mg,N 72 g/mol100 100 g/mol =72%

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