Question

How many total atoms are in 0.250g of P2O5?

Answer 1

1. Calculate no. of moles by dividing mass given/molar mass
= 0.250 /283.8
2. Now multiply no. of moles with avogadro's no.
3. The answer indicates no. of total atoms..

Answer 2

Step-by-step explanation:

According to the mole concept, there are
`6.022 * 10^(22)` atoms present.

It is given that mass is 0.250 g. And, number of moles are equal to mass divided by molar mass.

Mathematically, No. of moles =
`\frac{mass}{\text{molar mass}}`

As molar mass of
`P_(2)O_(5)` is 283.88 g/mol. Therefore, putting given values into the above formula as follows.

No. of moles =
`\frac{mass}{\text{molar mass}}`

=
`(0.250 g)/(283.88 g/mol)`

= 0.0008 mol

Hence, number of atoms present in 0.0008 mol are as follows.

`0.0008 mol * 6.022 * 10^(22) atoms/mol`

= 0.0048 atoms

Thus, we can conclude that there are 0.0048 atoms in 0.250 g of
`P_(2)O_(5)`.