Question

a sealed vessel containing argon, oxygen, and nitrogen has a total pressure of 3.75 atm and partial pressures of 0.75 atm for oxygen and 1.80 atm for nitrogen. what is the partial pressure of argon in atm? p of ar (atm)

Explanation:

Step1: Recall Dalton's Law

Total pressure = sum of partial pressures: $P_{\text{total}} = P_{\text{Ar}} + P_{\text{O}_2} + P_{\text{N}_2}$

Step2: Rearrange for $P_{\text{Ar}}$

$P_{\text{Ar}} = P_{\text{total}} - P_{\text{O}_2} - P_{\text{N}_2}$

Step3: Plug in values

$P_{\text{Ar}} = 3.75 - 0.75 - 1.80 = 1.20$

Answer:

1.20