Problem- 1 how many liters of oxygen gas at 7410 x 102 torr, Ask an Expert

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Problem- 1) How many liters of oxygen gas at (7.410 x 10^2) torr and 22 c are needed for the complete combustion of (3.07 x 10^0) moles of propane, C3H8?

2) After (5.7700 x 10^-1) L of Ar at (1.1200 x 10^0) atm and 227 c is mixed with (1.1200x10^-1)L of O2 at (6.0500 x 10^2) torr and 127 c in a (4.44 x 10^2) mL flask at 300 K , what is the pressure in the flask in atm?:

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