Assignment Details

Chem D - Read text; do worksheets

2018-2019

Chemistry (D)

Date Due

Feb. 25, 2019

Additional Info
  • Read the rest of Chapter 11 (Gas Laws); sections 3-4 cover the Ideal Gas Law and Diffusion/Effusion
  • Finish #s 7-9 from the Gas Law worksheet on OneNote, if you didn't already complete it.
  • Do the 2-sided worksheet posted on OneNote--regarding the Ideal Gas law, finding molar mass, and gas density problems. Be sure to show equation used, substitution step (with labels), and answer --- if you want to receive full credit. Do as many as you can; if you get stuck, go on to the next one.  Some are easier than others. Note that you may need to convert grams into moles by using the molar mass!
  • HINT #1: if you are using the typical R value, then your volumes must be in L (not mL or cm3), pressure must be in atmospheres (not mm), and T must be in Kelvins.
  • HINT #2: If you are trying to solve gas density or MM problems with conditions not at STP, you might be glad to know the following relationships. (MM means 'molar mass' and g is mass in grams.) Substituting "g/MM" in place of "n" or 'moles' gives us PV = (g/MM) R T or... solving for MM gives us:
  • MM = gRT/(PV)
  • gas density, d = g/V = MM*P/(RT)