1. Calculate the molar mass of P2O5:
* Phosphorus (P) has a molar mass of 30.97 g/mol
* Oxygen (O) has a molar mass of 16.00 g/mol
* Molar mass of P2O5 =(2 * 30.97 g/mol) + (5 * 16.00 g/mol) =141.94 g/mol
2. Calculate the number of moles of P2O5:
* Moles =mass / molar mass
* Moles of P2O5 =0.330 g / 141.94 g/mol =0.00232 mol
3. Calculate the number of molecules of P2O5:
* Avogadro's number =6.022 x 10^23 molecules/mol
* Number of molecules =moles * Avogadro's number
* Number of P2O5 molecules =0.00232 mol * 6.022 x 10^23 molecules/mol =1.39 x 10^21 molecules
4. 총 원자 수를 계산하십시오 :
* Each P2O5 molecule contains 2 phosphorus atoms and 5 oxygen atoms, for a total of 7 atoms per molecule.
* Total atoms =number of molecules * atoms per molecule
* Total atoms =1.39 x 10^21 molecules * 7 atoms/molecule =9.73 x 10^21 atoms
Therefore, there are approximately 9.73 x 10^21 atoms in 0.330 g of P2O5.
