Need help solving for molarity THANKS?

Posted on 2016-11-17 18:50:00 in Chemistry by MATT

I'm not quite sure how to do the calculations on finding the molarity in a lab work I just did. The questions are to find the molarities for a couple of diluted solutions using NaCl and H2O. Maybe helping me find 1 or 2 of the solutions I can solve for the rest. here are the data. 

I had to prep 
(A) 100ml flask with 15.0126g NaCl 
(B) 50ml flask with 25ml soln(A) 
(C) 25ml flask with 5ml Soln(A) 
(D) 25ml flask with 2ml soln (A) 

1. mass of 50ml beaker= 26.7214g 
2. mass of 50ml beaker + NaCl = 41.7240g 
3. mass of 10ml flask/stopper = 13.7631g 
4. mass of 10ml flask/stopper/water = 21.6933g 
5. mass of 10ml flask/stopper/solution D = 23.4695g 
6. mass of 10ml flask/stopper/solution C = 23.5533g 
7. mass of 10ml flask/stopper/solution B = 23.8533g 
8. mass of 10ml flask/stopper/solution A = 24.5090g 

calculation work: 
1. molarity for solution A 
2. molarity for solution B 

Any help is appreciated. Thanks!

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