Question

A helium balloon has a volume of 36 L. The pressure of the helium gas in the balloon is 132 kPa and its temperature is 27 degrees Celsius. How many moles of helium are in the balloon?

Answer 1

`n =1.905mol`

Step-by-step explanation:

Hello!

In this case, by considering helium gas as an ideal one, we can use the following equation:

`PV=nRT`

Whereas P should go in atmospheres and T in Kelvins; thus we proceed as follows:

`n=(PV)/(RT)=(132kPa*(1atm)/(101.325kPa)*36L)/(0.08206(atm*L)/(mol*K)(27+273)K) =1.905mol`

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