- #1

QueenFisher

**ideal gases. what fun. please help!!**

i'm having problems getting sensible answers...

1.

a cylinder contains 4.62g of hydrogen at 17C and 2.32 x10^6 Pa

calculate number of moles.

actual mass/molecular mass= 4.62/2= 2.31

(relative molecular mass given as 2 in the question...is this right??)

calculate density of gas.

density=mass/volume

volume:

using pV=nRT

V=nRT/p

=2.31x8.31x(17+273) all divided by 2.32x10^6

=0.00239951...

density=4.62x10^3 (to make it into kg) divided by 0.00239951...

gives 1925393.101... kgm^-3

which seems awfully high.

i have another question but i'll put it in another thread before my computer crashes and i lose all of this.