show work please!
21. The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the
final pressure B) 0.30 atmC)3.3 atm D) 4.8 atm E)1.0 atm of the gas, assuming no change in
moles or temperature? A) 1.2 atm me of a gas with an initial pressure of 380 mmiig atm
increases from 5.0 L to 8.0 L. What is I pressure of the gas,in atm, assuming no change in moles
or temperature? 22. The A) 238 atm B) 2.4 atmC) 0.31 atm D) 0.80 atm E) 8.0 atm A balloon is
filled with helium gas. For the questionts) that follorw, select the letter of the ballon diagram that
corresponds to the given change in conditions. Initial Volume The balloon is put into a chamber
whose pressure is less than the atmospheric pressure and at atmospheric temperature. A)A B) B
23. C) C D) A and B E) B and C
Solution
Ans 21 : B) 0.30 atm
Pressure is related to volume as : p1V1 = p2V2
putting values :
1.2 x 1.0 = p2 x 4.0
p2 = 0.3 atm