how many P2O5 molecules are contained 55.3g of P2O2. I) how many oxygen atoms are contained in the sample

Answer 1

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.