Answer to Question #81983 in General Chemistry for Katrina

General Chemistry

Question #81983

a. How many moles of Ar are present in a 2.7 L flask that has a pressure of 1.02 atm at a temperature of 26°C?

Expert's answer

Answer:

T=26+273=299 K

V=2,7 L

P=1,02 atm

R=0.082

Formula: PV=nRT, n=PV/RT

n=PV/RT =1,02 x 2,7 / 0,082 x 299= 0.1123 mol.

n= 0.1123 mol (Ar)

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