December 22, 2024, 12:34:52 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Conversion Question (mg/100mL to mol/L)  (Read 21182 times)

0 Members and 1 Guest are viewing this topic.

Offline SeanzSens

  • New Member
  • **
  • Posts: 5
  • Mole Snacks: +0/-0
Conversion Question (mg/100mL to mol/L)
« on: October 29, 2006, 03:40:04 PM »
I know this is easy, and I definetly should know this, but for some reaosn I just cannot get myself going on this.  The question I am dealing with is:
A patient has a blood concentration of acetone of 20 mg/100mL.  Convert this to mol/L.

Thanks for any help
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27885
  • Mole Snacks: +1815/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Conversion Question (mg/100mL to mol/L)
« Reply #1 on: October 29, 2006, 04:02:39 PM »
Convert 20 mg of acetone to moles.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline SeanzSens

  • New Member
  • **
  • Posts: 5
  • Mole Snacks: +0/-0
Re: Conversion Question (mg/100mL to mol/L)
« Reply #2 on: October 29, 2006, 04:16:59 PM »
Quote from: Borek on October 29, 2006, 04:02:39 PM
Convert 20 mg of acetone to moles.

So by this you mean use n=m/M finding the n from my 0.020g/58.09g?
Logged

Offline Yggdrasil

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3215
  • Mole Snacks: +485/-21
  • Gender: Male
  • Physical Biochemist
Re: Conversion Question (mg/100mL to mol/L)
« Reply #3 on: October 29, 2006, 04:21:55 PM »
Here are the steps I would take:

1)  Convert mg/100mL to mg/L (hint: mg/L = mg/1000mL)
2)  If your concentration is x mg/L, find how many moles of acetone are in x mg.  This will give you the number of moles per liter.

You could also reverse the order:
1)  Convert 20mg of acetone to moles of acetone.
2)  Divide the number of moles by 100mL to get the concentration in moles/100mL
3)  Convert moles/100mL to moles/L.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links