A gas mixture contains 1.06 g O2 and 1.06 g N2. If the partial pressure of O2 is 55.7 kPa, what is the total p

Question

the answer is expressed in kPa

Answer 1

change your grams of O2 and grams of N2 to moles by dividing by their molecular masses (O2 = 2 x 16, N2 = 2 x 14)

Partial Pressure = total Pressure x mole fraction

to get the mole fraction for O2, put the moles of O2 over the total moles of gas (O2 + N2).

You know the partial pressure for O2, you now have the mole

fraction for O2, total pressure is the unknown, solve for it.

Summary

55.7 kPa = X(moles oxygen)/(moles oxygen + moles nitrogen)

Answer 2

111.4 kpa the oxygen and nitrogen are equal (nitrus oxide, aka laughing gas) amounts so the pressure is equal for both gases. Duh! Use you head kiddo! Even a simpleton could have figured that one out. How much do they spoon feed you kids in school these days? sheesh!