60.0 g O2=___________molecules O2

mols O2 = grams/molar mass

1 mol O2 contains 6.02E23 molecules O2.

So the answer is 1.13×10^24 molecules O2?

I agree.

To determine the number of molecules of O2, you can follow these steps:

1. Start with the given amount of O2 in grams: 60.0 g O2.

2. Convert the given mass of O2 to moles using the molar mass of O2. The molar mass of O2 is the sum of the atomic masses of oxygen (O), which is 16.00 g/mol. Therefore,

Moles of O2 = Given mass of O2 / Molar mass of O2
= 60.0 g / 32.00 g/mol
= 1.875 mol.

3. Use Avogadro's number (6.022 x 10^23) to convert the moles of O2 to molecules. Avogadro's number represents the number of particles (atoms, molecules, or ions) in one mole of a substance.

Number of molecules O2 = Moles of O2 x Avogadro's number
= 1.875 mol x 6.022 x 10^23 molecules/mol
= 1.13 x 10^24 molecules.

Therefore, 60.0 g of O2 is equivalent to 1.13 x 10^24 molecules of O2.