March 29, 2024, 08:24:54 AM
Forum Rules: Read This Before Posting


Topic: Volume % and Ideal Gas Law  (Read 4992 times)

0 Members and 1 Guest are viewing this topic.

Offline bigd

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Volume % and Ideal Gas Law
« on: November 05, 2007, 04:28:44 PM »
Rubbing alcohol is 70.% isopropyl by volume. How many ml of isopropyl alcohol are in a 1 pint (473 ml) container? I think the answer is 330 ml, but I need help setting the equation up.

A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP? I think the answer is 17 L, is this right?
V= nRT/P. I converted 4.0 g and 2.0 g to moles and then added them together to get n.
« Last Edit: November 09, 2007, 11:44:05 AM by bigd »

Offline CT101

  • Regular Member
  • ***
  • Posts: 11
  • Mole Snacks: +0/-1
Re: Volume % and Ideal Gas Law
« Reply #1 on: November 05, 2007, 08:16:30 PM »
Check your math on the IPA problem. The gas one is correct.

Offline bigd

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Re: Volume % and Ideal Gas Law
« Reply #2 on: November 05, 2007, 11:08:28 PM »
Thank you
« Last Edit: November 09, 2007, 11:45:24 AM by bigd »

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
Re: Volume % and Ideal Gas Law
« Reply #3 on: November 06, 2007, 01:10:24 AM »
70 % (v/v) means 70 ml in 100 ml of solution.
AWK

Sponsored Links