How many moles of helium gas occupy 14.2 L at 194 K and 2.40 atm?
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PV= nRT
P = Pressure in atm
V = Volume in litres
n = number of moles
R = Gas Constant
T = Temperature in kelvin
2.4 * 14.2 = n *0.0821 * (273+194)
34.08 = n * 0.0821 * 467
34.08 = n *38.3407
n = 34.08/38.3407
n = 0.8888(approx)
shawanatarbor:
Isn't the temperature already written in Kelvin, 194 K?
The correct answer is 2.14 moles
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