Question

1

Answer 1

9.331 x  $10^{23}$ many individual oxygen atoms are contained in a sample of P₂O5 that also contains 0.620 moles of P.

What are moles?

A mole is defined as 6.02214076 × $10^{23}$of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

$P_2O_5$ →  $2P^+{^5} + 5O{^-^2}$

Given:

0.620 moles of P

Let us assume a mole of oxygen atoms.

2÷0.620 = 5÷a                    Cross Multiply

2a = 0.620 x 5                   Divide both sides by 2

a= 0.310 x 5                      Combine

a = 1.55                              moles of oxygen.

Atoms are there in 1.55 moles of oxygen:

1 mole of anything contains 6.02 x $10^{23}$ items of  that mole

1.55 moles of oxygen contain x  atoms of oxygen

1÷1.55 = 6.02 x $10^{23}$ ÷x                  Cross multiply

1 x a = 1.55 x 6.02 x $10^{23}$                   Combine

a = 9.331 x  $10^{23}$

Hence, 9.331 x  $10^{23}$ many individual oxygen atoms are contained in a sample of P₂O5 that also contains 0.620 moles of P.

Learn more about moles here:

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