Chemistry moles question(multiple choice) needs explanation as well

Chemistry
Tutor: None Selected Time limit: 1 Day

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 

Dec 9th, 2015

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

                                                  =0.118326

                                                  =0.118 moles



Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 9th, 2015

Thank you for this and if you want any clarification , you are always welcome

Dec 9th, 2015

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