Help with a chemistry question!

Figured it out!

0.1 x 0.2 = 0.02 moles of NaCl. Therefore, there are 0.02 moles of Na+ in the NaCl
0.1 x 0.2 = 0.02 moles of Na2C03. Therefore, there are 0.02 moles of Na2 in the Na2CO3 meaning there are 0.04 moles of Na+ in Na2CO3.
0.02 + 0.04 = 0.06 moles
The total volume is 200cm3.
0.06/ 0.02dm3 = 0.3mol/dm3

yup

4 year old thread. I’m pretty sure OP figured it out.

I was completing past papers and i came across it lol