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Chemistry hlep with concentration calculations

It's been two years since I've done chemistry so I'm struggling with some of the basics. Any help is appreciated :smile:


In the next 2 questions, calculate the volumes (in mL) for the solutions specified
9. A solution of concentration 2.6 M, containing 0.98 g of sodium chloride.
10. A solution of concentration 23.6 mM, containing 0.026 g of hydrochloric acid.

For Q9, I calculated the Mr of NaCl which is 58.443 and used it to calulate the number of moles by using the mole = mass/Mr equation.
From that I calculated the number of moles to be 0.01677

Then using the equation volume = moles/concentration, I'm a bit confused.
volume = 0.01677/2.6 = 0.00645 ml?
I get confused with units. Will the volume be 0.00645ml or do I have to divide 2.6 by 1000 in order for this to be correct?

Help :')
Sorry you've not had any responses about this. :frown: Are you sure you've posted in the right place? :smile: Here's a link to our subject forum which should help get you more responses if you post there. :redface:

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