Firstly you have forgotten to divide by 4 because the standard phosphorus allotrope the white phosphorus consists of molecules P4. After that you should divide the obtained value by Avogadro's number. How have you obtained such a large value? It is seemed that you added 23 to 25 in power, while it should be subtracted.

Bri

11.02.14, 01:46

i did not get that. i divided 1.20 x 10^25 by Avogadro's number and i got 1.99 x 10^47 mol P

Assignment Expert

30.10.12, 15:00

Each molecule of P<sub>4</sub> contains 4 atoms, that's why there's that "4" factor

## Comments

Assignment Expert18.02.14, 15:16Firstly you have forgotten to divide by 4 because the standard phosphorus allotrope the white phosphorus consists of molecules P4. After that you should divide the obtained value by Avogadro's number. How have you obtained such a large value? It is seemed that you added 23 to 25 in power, while it should be subtracted.

Bri11.02.14, 01:46i did not get that. i divided 1.20 x 10^25 by Avogadro's number and i got 1.99 x 10^47 mol P

Assignment Expert30.10.12, 15:00Each molecule of P<sub>4</sub> contains 4 atoms, that's why there's that "4" factor

alaisha29.10.12, 20:05Were is the 4 coming from

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