Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles?

45.0 mL O3

35.0 mL N2

15.0 mL of CO2

25.0 mL of SO3

1 answer

Convert each to moles.l mol = grams/molar mass or mol = M x L or use PV = nRT and solve for n.
A mole of each will contain the same number of molecules.