[dillonchester21]

Can you guys help me/check these for me?
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I have hydro carbon in a container(pretty sure volume is constant) that is 1.00 L. The pressure is .200 atm. The temperature is 400K.

1) find mol of hydrocarbon

(.200)(1.00) = (x)(.08206)(400)
x= .00609 mols

2) oxygen gas was added find the partial pressure of Oxygen gas if the total pressure is 1.40 atm.

PT = Phydrocarbon + Poxygen gas
Poxygen gas = 1.20 atm

3) A spark was added to hydrocarbon and oxygen gas and it combusting forming CO2 and H2O. There was a little O2 left over after the reaction. The partial pressure of CO2 is .6atm and H2O is .8 atm. Temperature is still 400K.

a) Partial Pressure of O2 = ??

[Borek]

3) A spark was added to hydrocarbon and oxygen gas and it combusting forming CO2 and H2O. There was a little O2 left over after the reaction. The partial pressure of CO2 is .6atm and H2O is .8 atm. Temperature is still 400K.

a) Partial Pressure of O2 = ??

It is about stoichiometry and Avogadro's hypothesis.

How much oxygen was consumed to produce CO₂? H₂O?