how many P2O5 molecules are contained 55.3g of P2O2. I) how many oxygen atoms are contained in the sample
To find the number of P2O5 molecules in 55.3g of P2O2, we first need to calculate the number of moles of P2O2 in the sample.
The molar mass of P2O2 = 2(P) + 2(O) = 62.0 g/mol
Number of moles = mass / molar mass = 55.3g / 62.0 g/mol = 0.893 moles
Since 1 molecule of P2O2 contains 2 oxygen atoms, the number of oxygen atoms in the sample can be calculated as follows:
Number of oxygen atoms = 0.893 moles of P2O2 * 2 = 1.786 moles of O
Next, we will need to convert moles of O to molecules of O. We know that 1 mole of any substance contains Avogadro's number of molecules, which is approximately 6.022 x 10^23.
Number of oxygen atoms = 1.786 moles * 6.022 x 10^23 molecules/mol = 1.074 x 10^24 molecules
Therefore, the sample of 55.3g of P2O2 contains approximately 1.074 x 10^24 oxygen atoms.