chemistry
posted by anonymous .
A sample of gas with a volume of 2.0 L exerts a pressure of 1.0 atm. If the volume is changed to 1.0 L (at constant temperature), what is the pressure?
a. 0.5 atm
b. 1.0 atm
c. 2.0 atm
d. 4.0 atm

P1V1 = P2V2
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