A bicycle pump contains air at STP. As the tire is pumped up, the volume of air decreases by 30% with each stroke. What is the new pressure of air (in atm) in the chamber after the first stroke, assuming no temperature change? Select the correct answer.(adsbygoogle = window.adsbygoogle || []).push({});

a. 1.4

b. 0.7

c. 2.6

d. 0.9

e. 2

What I have done is

T1=T2

P1*V1/(R*n1)=P2*V2/(R*n2)

P1*V1/(n1)=P2*V2/(n2)

But the question doesn't tell us number of mole of the air, how do we solve this question?

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# Homework Help: Bicycle pump

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