Chemistry Homework Help

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What is the mass in grams of 7.5 * 10 ^15 atoms of nickle? (show work)

Jun 5th, 2015

Hi, Simplyamazin! So what we need to do to find the moles is take the atoms of nickel over the atoms per mole.

So: (7.5 * 10 ^15)/ (6.02 *10^23) = 1.25 * 10^-8 moles

Now, we need to convert moles to grams. When we look at the periodic table, we see that there are 58.7 grams per mole of Nickel (look at atomic weight). Now we just need to multiply the atomic weight (grams per mole)  by the amount of moles we have (1.25 *10^-8)

This gives us: (1.25 * 10 ^ -8) * 58.7 = 7.3 * 10 ^ -7

Hope this helps!

Jun 5th, 2015

For the answer 7.3 * 10 ^ -7, the units are grams of nickel. Sorry for not putting the units in the original :p . Let me know if you have any questions!

Jun 5th, 2015

i do have a comment on this i should be more in detail shouldnt i? i never realized that until now  the way i need the work shown is in a table

 Start here next part last part leave blank next part last part
answer... thats how i need it..
Jun 5th, 2015

Is the table being used for stoichiometry? Do you have a bigger picture/full picture of the table by chance.

Jun 5th, 2015

yeah i just posted a picture with the questions its up now

Jun 5th, 2015

yeah i just posted a picture with the questions its up now

Jun 5th, 2015

Here's the table filled out. You multiply across and divide the top from bottom. The units cancel out to give you units in grams of Nickel.

Jun 5th, 2015

Thank you

Jun 5th, 2015

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Jun 5th, 2015
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Jun 5th, 2015
Dec 3rd, 2016
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