A 2500-l cylinder contains 650 heg and 350 krg by mass at
A 250.0-L cylinder contains 65.0% He(g) and 35.0% Kr(g) by mass at 25.0° C and 1.35 atm total pressure. What is the partial pressure of He in this container?
A) 0.473 atm
B) 0.675 atm
C) 0.878 atm
D) 1.32 atm
E) 1.35 atm
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