Hailey G.

asked • 03/25/21

I don't understand how to start my chemistry problem

okay, so I might be doing something wrong, but I'm not even sure where to start with the 1st problem, but I worked out the second one and just need to know if I got the right answer for it(and what sig-fig to round it to).

For this one I think i'm supposed to find P in the PV=nRT set up, but I also need n and R and I can't have R with psi but I don't have any numbers to change from psi, if that makes sense.

  1. A 38.3 mg sample of butane (C4H10) gas at 258.7 K occupies a volume of 4.09 mL, what is the pressure in psi?

For this one I got 1.40067 without rounding it to any sig-figs because i'm not sure how many i'd round it to.

  1. What is the mass in grams of a 1.4 L sample of nitrogen gas at -16.1oC when the pressure is 600.7 mm Hg?

Thank you so much for your help!

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