A sample of krypton gas collected at a pressure of 1.30 atm and a temperature of 17.0 °C is found to occupy a volume of 24.7 liters. How many moles of Kr gas are in the sample?
mol
To find the number of moles of krypton gas in the sample, we can use the ideal gas law equation:
PV = nRT
Where:
P = pressure = 1.30 atm
V = volume = 24.7 L
n = number of moles (what we want to solve for)
R = ideal gas constant = 0.0821 L.atm/mol.K
T = temperature in Kelvin = 17.0°C + 273.15 = 290.15 K
Plugging in the values:
(1.30 atm)(24.7 L) = n(0.0821 L.atm/mol.K)(290.15 K)
31.91 = 23.84n
Divide by 23.84:
n = 1.34 moles
Therefore, there are 1.34 moles of krypton gas in the sample.