In kelvin (k). PLEASE. :)
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(0.459 g NO2) / (46.0056 g NO2/mol) = 0.009977 mole NO2
PV = nRT
T = PV/nR = (1.75 atm) (14.2 L) / ( 0.009977 mol) (0.08205746 L atm /K mol) = 30400 degrees K
PV = nRT
T = PV/nR = (1.75 atm) (14.2 L) / ( 0.009977 mol) (0.08205746 L atm /K mol) = 30400 degrees K