First, we have to calculate the amount of gas in moles using the ideal gas equation.
P = pressure, atm
V = volume, L
n = moles, mol
R = gas constant = 0.08206 (L·atm)/(mol·K)
T = temperature, K
Isolate n (number of moles of gas):
V = 0.651 L
P = 1.00 atm
T = 31°C + 273.15 = 304.15 K
R = 0.08206 (L·atm)/(mol·K)
Calculate for n:
A 1.26 g gas sample occupies 651 mL at 31°C and 1.00 atm.
What is the molar mass of the gas?
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