anonymous
  • anonymous
Will fan and medal!! Give the oxidation number of Nitrogen in each of the following compounds or ions: a) N2O b)Ca(NO3)2 c)NH4 ^+ d)N2H4 e)Mg3N2 Please explain how you got them
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Photon336
  • Photon336
Let's take c) first 1. first we look to see if there's any kind of charge on the molecule 2. then we look for the oxidation states of the element(s) 3. we multiply oxidation state by the number of atoms for that element 4. add them all up. so for \[NH_{4}^{+}\] We have 1 atom of nitrogen and 4 atoms of hydrogen. Hydrogen has an oxidation state of +1 and there are four atoms right? so that's +4 we realize that the charge on our compound is +1 so the oxidation states must sum up to +1. Now we have +4 for hydrogen, and what oxidation state for nitrogen will give us +1 total. that's -3. so nitrogen is -3 and hydrogen is +1 -3 + 4 = +1 try choice D and tell me what you get
Photon336
  • Photon336
\[N_{2}H_{4} \] try this one it's one of the choices @Shaekitchen
anonymous
  • anonymous
im thinking aboout it but im getting no where just give me a min @Photon336

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anonymous
  • anonymous
Im sorry im still not quite understanding @Photon336 Im nnot sure how I find what they add up to
Photon336
  • Photon336
@Shaekitchen first step is there a charge on N2H4 ?
anonymous
  • anonymous
How do i tell like i know that H has 1+ and theres 4 of them so 4+ right? @Photon336
Photon336
  • Photon336
yes correct
Photon336
  • Photon336
@shaekitchen read these rules below. these are the most important YOU MUST LOOK TO SEE IF THERE IS A CHARGE ON THE MOLECULE, as in an ion. IF THERE IS A CHARGE: The oxidation states must add up to that charge. IF THERE IS NO CHARGE: the sum of the oxidation states = zero.
anonymous
  • anonymous
so in N2H4 theres no charge correct?? @Photon336
Photon336
  • Photon336
:) yep
anonymous
  • anonymous
sso then would the charge on N be 2+ ?
Photon336
  • Photon336
@Shaekitchen work out the entire problem and show me step by step.
Photon336
  • Photon336
this will help you understand this
Photon336
  • Photon336
@Shaekitchen
anonymous
  • anonymous
I think i got it -6?
anonymous
  • anonymous
@Photon336 thats the only way i got it to cancel it out
Photon336
  • Photon336
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Photon336
  • Photon336
|dw:1444101598809:dw|
Photon336
  • Photon336
@Shaekitchen please take a close look at how i set up the problem
anonymous
  • anonymous
okay I am going to try N2O Thaat way you explained i really helped! @Photon336
Photon336
  • Photon336
@Shaekitchen Write out everything by using the drawing tool then post it here
Photon336
  • Photon336
But you need to make sure that you understand how I did it, does tat make sense?
anonymous
  • anonymous
My computer isnt letting me use the drawing tool If i have N2O I have a charge on O of -2 right? Theres so many charges on O how do I know which one to use? @Photon336
Photon336
  • Photon336
You always ask this question first before doing anything @Shaekitchen is there a charge on the molecule? oxygen almost always has a charge of -2
anonymous
  • anonymous
Theres no charge on this molecule but if O is 2- doesnt that mean that N would just be 1-?
Photon336
  • Photon336
almost, but no charge means oxidation states MUST = ZERO ask your self if you summed up those numbers would you get zero?
anonymous
  • anonymous
I got it it would be +1 Im going to do the rest on my own as my computer is slow thank you for your help @Photon336
Photon336
  • Photon336
@Shaekitchen great job, it's +1 remember to use those rules. you should be able to figure out the rest now take care

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