Jennifer B. answered • 09/22/15

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If you ever are in doubt, or just not sure where to begin with a problem like this, CONVERT TO MOLES. That's my biggest piece of advice for these types of conversion problems, especially when dealing with moles, atoms, molecules, grams, etc.

Start with what is given. You know that there are 1.33*10^24 TOTAL atoms of N. (Note that this is just N, not N

_{2}, which is what you need to find an answer "in terms of." There are two Nitrogen atoms that bond together to make N_{2}. You should find out how many molecules you have of N_{2}by dividing 1.33*10^24 by two.1.33*10^24 atoms N = 6.65*10^23 molecules N

_{2}Now, recall that Avogadro's number (is just a number and) is equal to 6.022*10^23 molecules, atoms, etc. So we know that:

6.002*10^23 molecules = 1 mole of N

_{2}Use this and what we found for the number of atoms above to create conversion factors with units that will cancel out to give us our answer in moles of N

_{2}.(6.65*10^23 molecules N

_{2})/1 * (1 moles N_{2})/(6.0223*10^23 molecules N_{2}) = ?"molecules N

_{2}" will cancel each other out, and we are left with moles N_{2}, which is the units we want for our answer.When you crunch the numbers you should get 1.10 moles N

_{2}assuming my calculations are correct.***Note: Make sure to take significant figures into account for problems like this if you are required to do so.***

I hope this helps. Let me know if you have further questions.

Jennifer B.

You're welcome. I hope the rest of your day goes well. Let me know if you have any other questions I can try to help answer. :)

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09/22/15

Angelica J.

09/22/15