Question

what mass of H3PO4 will contain.0.25 mole of oxygen​

Answer 1

Answer:

1 mole of magnesium phosphate contains 8 moles of oxygen atoms ( as can be seen from chemical formula of magnesium phosphate there are 8 atoms of oxygen in one molecule of magnesium phosphate) . So, 1 mole contains 8 mole atoms, Implies, 0.25 moles contain 0.25*8 = 2 mole atoms of oxygen. So the answer is 2 moles.

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Answer 2

Explanation:

1 mole of magnesium phosphate contains 8 moles of oxygen atoms ( as can be seen from chemical formula of magnesium phosphate there are 8 atoms of oxygen in one molecule of magnesium phosphate) . So, 1 mole contains 8 mole atoms, Implies, 0.25 moles contain 0.25*8 = 2 mole atoms of oxygen. So the answer is 2 moles.