More Chemistry?

Question

I need help with a couple Chemistry problems. 4 to be exact, but I will post the seperatley. They are apart of a study guide these are 4 out of 20. I have answered the other 16 but I am struggling with these. I have no idea how to do them. Please help.

What are the partial pressures for 28.9 g of Carbon dioxide CO2 and 23.5 g of oxygen O2, that are found within a steel cylinder with a total pressure of 1.5 atm?

Answer 1

partial pressures are based on moles.

Convert both gases to moles and use the molar fractions multipled by the 1.5 atm.