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Topic: Need *delete me* {mass of atoms}  (Read 5665 times)

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Offline thare22

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Need *delete me* {mass of atoms}
« on: October 13, 2012, 09:07:07 PM »
What is the mass in grams of oxygen atoms in 5.04x1025 molecules of ammonium sulfate?
I cant seem to figure it thanks for your *delete me*

*MOD Edit*
Add actual question in title instead of
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Help me!!!
« Last Edit: October 14, 2012, 09:33:29 AM by Arkcon »
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Offline thare22

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Re: Need *delete me*
« Reply #1 on: October 13, 2012, 09:40:32 PM »
Anything? just a little direction is all i need. . .
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Offline FLgirl

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Re: Need *delete me*
« Reply #2 on: October 13, 2012, 10:14:52 PM »
Maybe this can help: http://www.chem.memphis.edu/bridson/FundChem/T11a1100.htm

Oh and what does *delete me* mean exactly?
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Offline thare22

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Re: Need *delete me*
« Reply #3 on: October 13, 2012, 10:40:55 PM »
Im not sure why it did that.
Heres what i got but i still dont think its right

5.04x1025x1 mol (NH4)2SO4/ 132.16 g/mol x 4 mol O/ 1 mol (NH4)2SO4=1.525x1025
Now do I convert to grams? The question wants grams of Oxygen atoms in the 5.04x1025
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Offline CopperSmurf

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Re: Need *delete me*
« Reply #4 on: October 13, 2012, 11:33:21 PM »
turn your number of molecules into moles first, then you can use your molar mass (g/mole).
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Offline EpicWinston

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Re: Need *delete me*
« Reply #5 on: October 13, 2012, 11:45:45 PM »
grams of oxygen atoms in 5.04x1025 molecules of ammonium sulfate. ammonium sulfate = NH4SO4. So all you do is go from molecules to moles to grams. 5.04X1025*1 mol NH4SO4/ 6.022x1023 * 4 mol O/ 1 mol NH4SO4 * 16.
 
1) molecules to moles of NH4SO4
2) moles or NH4SO4 to moles of O
3) Moles of O to grams of O

Hey if you need more practice/ help go to http://www.explorelearning.com/ do a free trial and type stoichiometry in the search bar it is a ton of help. That's How I learned stoichiometry in high school
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Offline thare22

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Re: Need *delete me*
« Reply #6 on: October 13, 2012, 11:49:23 PM »
Like....?
5.04x10^25 x 1/ 6.022x10^23 x 4/1 x 16 = 5.3563 x10^25 ?
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Offline EpicWinston

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Re: Need *delete me*
« Reply #7 on: October 14, 2012, 12:04:37 AM »
5356.36 I think
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Offline Hunter2

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Re: Need *delete me*
« Reply #8 on: October 14, 2012, 07:42:58 AM »
Still not anwered what the *delete me* means.
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Offline Borek

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Re: Need *delete me*
« Reply #9 on: October 14, 2012, 08:31:03 AM »
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ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline curiouscat

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Re: Need *delete me*
« Reply #10 on: October 14, 2012, 10:50:32 AM »
Quote from: Borek on October 14, 2012, 08:31:03 AM
http://www.chemicalforums.com/index.php?topic=59314.0

I'm henceforth going to circumvent rules by using "assist", "aid" and "succour". 8)
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Offline Arkcon

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Re: Need *delete me*
« Reply #11 on: October 14, 2012, 11:00:29 AM »
Quote from: curiouscat on October 14, 2012, 10:50:32 AM
Quote from: Borek on October 14, 2012, 08:31:03 AM
http://www.chemicalforums.com/index.php?topic=59314.0

I'm henceforth going to circumvent rules by using "assist", "aid" and "succour". 8)

If you'd like some help, ask someone to help you with a topic.  But adding a bunch of exclamation points, doesn't make your topic more important to us.  That's in Strunk and White's Manual of Style, sort of a textbook on how to write clearly.  As distinct from the usual Internet style guide, which would produce "WTF ROTFLAFAO Orbitals be teh shiznit !!!111!!!!"
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline thare22

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Re: Need *delete me* {mass of atoms}
« Reply #12 on: October 14, 2012, 07:25:51 PM »
I apologize, I'll format mine better from here on out. I was unclear and sorry don't know why it wrote delete me. I know I didnt mean too.
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