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c mass18 In this experiment you determined the mass of oxygen that combined with a weighed mass of magnesium) by subtraction:
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Answer #1

As mass of oxygen = mass of product - mass of magnesium taken originally.

Some extra mass in crucible will be considered as mass of product and thus

Calculated mass of oxygen will be more than its actual mass by this error , because calculated mass of oxygen is directly related to mass of product.

Hence by this error , calculated mass of oxygen will be too high than its actual mass .

Thank you.

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