A 10 Litre cylinder of oxygen at 4 atm pressure at 17 degree C developed a leak when the leak was repaired the remaining oxygen has a pressure of 3 atm calculate the number of moles of oxygen escaped?

Question

A 10 Litre cylinder of oxygen at 4 atm pressure at 17 degree C developed  a leak when the leak was repaired the remaining oxygen has a pressure of 3 atm calculate the number of moles of oxygen escaped?

unklerhaukus · Answer

$$pV=nRT$$
$$T=290[\text K]:\qquad V=10[\text L];\qquad p_1=4[\text {atm}]$$
first find the moles of gas before the leak

$$n=\frac{pV}{RT}$$
the find the moles of gas after the leak
$$p_2=3[\text {atm}]$$

unklerhaukus · Answer

the difference in   $n_1-n_2$ 
is the number of moles of $O_2$ that has leaked away

anonymous · Answer

thxxx  for helping plzz look my new question