Assuming the same pressure in each case, Calculate the mass of hydrogen required to inflate a balloon to a certain volume V at 100 ͘͘˚ c. If 3.5 g Helium is required to inflate the balloon to half the volume V at25 ˚ c

Question

Assuming the same pressure in each case, Calculate the mass of hydrogen required to inflate  a balloon to a certain volume V at 100 ͘͘˚ c. If 3.5 g Helium is required to inflate the balloon to half the volume V at25 ˚ c

aaronq · Answer

PV=nRT

substitute in: n=m/M

$$PV=\frac{ m }{ M }RT \rightarrow m=\frac{MPV }{ RT }$$

m is mass
M is molar mass

aaronq · Answer

but first find the pressure 3.5 g of He exerts at 25