Question

How many moles of hydrogen,phosphorus and oxygen there in 0.4 moles of phosphoric acid

Answer 1

Dear Student,

Phosphoric acid - H₃PO₄
1 molecule H₃PO₄ contains 3 atom of H, 1 atom of P, 4 atoms of O.

1 mole H₃PO₄ contains:

• 3 moles H
• 1 mole P
• 4 mole O

So 0.4 mole H₃PO₄ contains:

• 3*0.4 = 1.2 mole H
• 1*0.4 = 0.4 mole P
• 4*0.4 = 1.6 mole O

Hence, 0.4 mole H₃PO₄ contain 1.2 mole H, 0.4 mole P, 1.6 mole O.

Regards