15. How many grams of magnesium phosphate, Mg3 (PO4)2 will contain 0.25 mole of oxygen atoms?
(a) 818.75 x 10-3 (b) 818.75 x 10-2 (c) 818.75 x 10-5 (d) 818.75 x 10-3
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The relative masses of each element can be found on the periodic table. For example, one atom of magnesium weighs 24.31 amu (atomic mass units). However, one mole of magnesium weighs 24.31 g.
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