Q 29 At 27 C a cylinder of 20 L capacity contains three gases 0 502 g He, - Chemistry - Solutions

Question

Q 29 At 27 ° C a cylinder of 20 L capacity contains three gases
0 502 g He, 0 250 g O 2 and 1 00 g N 2 respectively If all these
gases behave ideally, the total pressure is
(a) 044 atm
(b) 065 atm
(c) 1 50 atm
(d) 0 208 atm

Vartika Jain · Accepted Answer

Dear Student,

We know that, PV=nRTFirst let us calculate total moles of gasn=0
5024+0 25032+128  =0 1255+0 0078+0 0357  =0
17V=20 LT=27°C=273+27=300 KR=0
0821 Latmmol-1K-1So, P=nRTVor, P=0 17×0
0821×30020        =0
209 atmHence, correct answer is (d)

Q.29. At 27 ° C a cylinder of 20 L capacity contains three gases 0.502 g He, 0.250 g O 2 and 1.00 g N 2 respectively If all these gases behave ideally, the total pressure is (a) .044 atm (b) .065 atm (c) 1.50 atm (d) 0.208 atm

Q.29. At 27 $°$ C a cylinder of 20 L capacity contains three gases 0.502 g He, 0.250 g $O_{2}$ and 1.00 g $N_{2}$ respectively If all these gases behave ideally, the total pressure is
(a) .044 atm
(b) .065 atm
(c) 1.50 atm
(d) 0.208 atm