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Question

How many moles of magnesium phosphate will contain 0.25 moles of oxygen atoms

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Solution

8 moles oxygen ———→ 1 mol of Mg3(PO4)2

1 mol of O ———→ 1/8 mol of Mg3(PO4)2

0.25 mol of Oxygen ——→ 1/8 x 25/100 mol of Mg3(PO4)2

………………………………….. => 1/32 mol of Mg3(PO4)2

………………………………….. => 0.03125 M of Mg3(PO4)2

…………………………………. => 3.125 x 10^(-2)


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