Explanation:
We are given: Pressure of krypton gas = 0.644 atm
: Temperature of krypton gas = 281 K
: Volume of krypton gas = 0.855 L
We know: Ideal gas constant = 0.082 L.atm/K.mol
We use the ideal gas law to find the number of moles:
[tex]\begin{gathered} PV\text{ = nRT} \\ \\ \therefore n\text{ = }\frac{PV}{RT} \\ \\ \text{ = }\frac{0.644\times0.855}{0.082\times281} \\ \\ \text{ = 0.024 mol} \end{gathered}[/tex]
Answer:
Moles of Kr in the sample is 0.024 mol.
