Question

how many moles of oxygen are present in 400cm^3 sample of gas at a pressure of 760mm of HG at temperature 300k​

Answer 1

Answer:

0.1625moles

Explanation:

p°v/T°=P1V1/t1

p°=1atm

V°=?

T°=273k

P1=1atm

V1=400ml

t1= 300k

s°v°=(PV/t)×(t°/p°)

=1×400/300×(270/1)

=400×270/300=364ml

so 22400ml of O2 at

STP=1mole

364ml of O2 at STP

=1×364/22400=0.1625moles.