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## Homework Statement

Friend's fiancee gave this problem on a final she was administering and isn't sure how the answer key is right:

Boyle's law describes the inverse variation between the volume of a gas and the pressure, y, exerted on it. A balloon with a volume of 2.25 liters is sealed in a bell jar, and air is pumped out. As the air is pumped out, the balloon expands. Which equation could be used to calculate the pressure exerted on the balloon?

## Homework Equations

Boyle's Law: P1V1=P2V2=k (presumably, this isn't given in the problem)

## The Attempt at a Solution

The question is worded as is, we've argued about specific meanings for like half an hour

Answer key says choice B) y=2.25/k

Everyone and their mother says C) y=k/2.25

I mean, by dimensional analysis alone it should be C, right?