Chemistry moles question(multiple choice) needs explanation as well

timer Asked: Dec 9th, 2015
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Question Description

Just a step by step processes required.

How many moles of NO3(-) ions are present in 533 mL of a 0.111 molar solution of Ca(NO3)2?

A) 0.0300 mol

B) 0.118 mol   (correct answer)

C)0.0592 mol

D) 1.22 mol

E) none 

I need an explanation please. I know the correct answer 

Tutor Answer

School: University of Virginia

Thank you for the opportunity to help you with your question!

Here we can calculate the moles of ca(No3)2 moles

it is 0.111 mol/dm^3* 533*10^(-3)dm^3

=0.059163 moles

Then you can see , for every mole of Ca(No3)2 has two moles of No3^-

Then number of moles of No3^- =2*0.059163


                                                  =0.118 moles

Please let me know if you need any clarification. I'm always happy to answer your questions.

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Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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