Question

How many miles of O are present in 4.9g of H3PO4.

Answer 1

Answer:

The atomic mass of H3PO4 is→

• 1×3+31+16×4
• 34+64
• 98

4 moles of oxygen present in 98 gram of H3PO4

Then in 4.9g of H3PO4 is→

4/98×4.9=4/20=1/5=0.2

So the

miles of O are present in 4.9g of H3PO4 is 0.2 gram

Answer 2

0.2 moles is an appropriate answer.

Explanation:

• The molecular weight of H₃PO₄  is =(1×3) + (31) +(16×four) = 34+64 = ninety eight grams.
• 4 moles of oxygen were found in ninety-eight grams of H3PO4.
• Then the molecular weight of H₃PO₄  in four.9g is = (4/98)×4.9 =four/20 =1/5 = 0.2

Therefore, the moles of O found in 4.9g of H3PO4 is 0.2 moles.

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