Problem E7 converting atoms to moles

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Andrea- 3J
Posts: 56
Joined: Tue Nov 14, 2017 3:00 am

Problem E7 converting atoms to moles

Postby Andrea- 3J » Thu Oct 04, 2018 1:11 am

E7 "A molecule of human DNA was found to contain 2.1x10^9 atoms of carbon. Calculate the chemical amount (in moles) of carbon atoms in the molecule of DNA."
Can we submit problems from the sixth edition chemistry textbook?

The problem above is asking for atoms to be converted to moles. I just need some clarification with this problem. Are we supposed to divide 2.1x10^9 atoms of c by avogadro's number (6.022x10^23)? Is this just a one step problem?

Seohyun Park 1L
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

Re: Problem E7 converting atoms to moles

Postby Seohyun Park 1L » Thu Oct 04, 2018 1:30 am

Since it's asking for moles and you're given number of atoms, it's like you said how you just need to divide by Avogadro's number

Minsub Lee 3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Re: Problem E7 converting atoms to moles

Postby Minsub Lee 3E » Thu Oct 04, 2018 1:49 am

Yes, you are able to submit questions from the sixth edition. On the syllabus, it will show the questions you need to answer for the sixth edition.

Courtney Quan 1C
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 2 times

Re: Problem E7 converting atoms to moles

Postby Courtney Quan 1C » Thu Oct 04, 2018 9:25 am

Yes, you need to divide by Avogadro's constant in order to convert from atoms to moles. And yes, you can submit questions from the sixth edition, just make sure that it's clearly written somewhere on your homework (alongside the chapter and homework number) before you turn it in :)

Julia Jones 1G
Posts: 29
Joined: Fri Sep 28, 2018 12:16 am

Re: Problem E7 converting atoms to moles

Postby Julia Jones 1G » Thu Oct 04, 2018 9:30 am

Yes, all you have to do is convert the atoms to moles so you would divide 2.1x10^9 by 6.022x10^23 to get your final answer


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