Chemistry
Grade-9
Easy
Question
How many moles of magnesium phosphate will 0.25 moles of oxygen contain?
- 3.125 × 10-14 moles
- 3.125 × 10 moles
- 3.125 × 1015 moles
- All the above
Hint:
One mole of magnesium phosphate has 8 moles of oxygen.
The correct answer is: 3.125 × 10-14 moles
- The chemical formula of magnesium phosphate is Mg3(PO4)2.
- One mole of magnesium phosphate has 8 moles of oxygen.
- 0.25 moles of oxygen present in 1/8
0.25 moles of magnesium phosphate, i.e. 3.12510-2.
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