January 11, 2025, 06:52:24 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: finding molar mass  (Read 5324 times)

0 Members and 1 Guest are viewing this topic.

Offline ahawk1

  • Regular Member
  • ***
  • Posts: 54
  • Mole Snacks: +0/-0
finding molar mass
« on: February 01, 2009, 12:59:59 AM »
A compound is known to contain 40.45% carbon and 35.90% oxygen by mass. Each molecule contains two atoms of oxygen. What is the molar mass of this substance?

This is my last problem i need to figure out. Ther percentages dont add up to 100 and i dont know what else would go in here so the problem itself is confusing to me, can u help me understand this problem?
Logged

Offline macman104

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 1644
  • Mole Snacks: +168/-26
  • Gender: Male
Re: finding molar mass
« Reply #1 on: February 01, 2009, 01:12:59 AM »
Hydrogen.

EDIT:  But....that really doesn't seem right.  Those percents do not add up right, you are not going to have 23.95% hydrogen by mass like that...
Logged

Offline ahawk1

  • Regular Member
  • ***
  • Posts: 54
  • Mole Snacks: +0/-0
Re: finding molar mass
« Reply #2 on: February 01, 2009, 01:20:02 AM »
Quote from: macman104 on February 01, 2009, 01:12:59 AM
Hydrogen.

EDIT:  But....that really doesn't seem right.  Those percents do not add up right, you are not going to have 23.95% hydrogen by mass like that...


alright thanks for the help once again lol...these are just randomly generated numbers in a problem so it might not seem right but i got the right answer. Thanks
Logged

Offline macman104

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 1644
  • Mole Snacks: +168/-26
  • Gender: Male
Re: finding molar mass
« Reply #3 on: February 01, 2009, 01:25:53 AM »
Can I ask what you got for the formula, just for my own curiosity?
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links