A 14.0 gram sample of oxygen gas has a volume of 809 milliliters at a pressure of 3.72 atm. The temperature of the O2 gas sample is ________ °C.
PV = nRT
where, P = pressure = 3.72 atm
V = volume = 809 mL = 0.809 L
n = number of moles = 14.0 g / 32.0 g/mol = 0.438 mol
R = Gas constant
T = temperature = ?
3.72 * 0.809 = 0.438* 0.0821* T
3.01 = 0.0360 * T
T = 3.01 / 0.0360 = 83.6 K = -189.4 oC
Therefore, temperature = -189.4 oC
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