Question

0.35 g of Nonyne gas was exposed to a temperature of 29 degrees C and a volume of 5.7 gallons. How much pressure does this exert?

Answer 1

Are you sure `"nonyne"` is a gas.........?

Explanation:

I don't have an Aldrich or Acros catalogue handy. But I am pretty sure that the isomeric nonynes would be distillable liquids (if they are available commercially!). I will assume that you speak of acetylene, `HC-=CH`, which is certainly a room temperature gas, and answer the question on this basis. There is also another assumption I must make; that is that you speak of `"US gallons"`.

So far as I know, and I try to avoid the use of whack units, `"1 US gallon"` `=` `3.79*L`. On the other hand, you might speak of `"Imperial Gallons"` `=` `4.54*L` (I would certainly use the latter unit here in the UK!). This confusion nicely illustrates why scientists (and syllabuses) should use non-ambiguous, standard units.

`"Moles of acetylene"=(0.35*g)/(26.04*g*mol^-1)=1.34xx10^-2*mol`.

And using the `"Ideal Gas Equation: "P=(nRT)/V`

`=(1.34xx10^-2*molxx0.0821*(L*atm)/(K*mol)xx302*K)/(5.7*"gallons"xx3.79*L*"gallon"^-1)`

`=1.54xx10^-2*atm-=11.7*mm*Hg`.

Anyway the whole question is pretty suspect.