Osmolarity of Solutions

[Aqualim]

Hey guys,

I'm not sure if this is the right directory for this kind of question, or if osmolarity is even taught to VCE Chemistry students, but I'll see if you guys can help me out anyway. The question is;

What would the osmolarity of 150mmol of Sodium chloride equate to in mOsml? (the question was something along those lines)
a) 150mOsml b) 300mOsml c) 400mOsml d) None of the above

Any help would be awesome

[Aqualim]

Don't worry I worked it out.

Turns out 1mmol/L of Sodium Chloride = 2mOsml/L osmolarity due to it being an ionic compound. Therefore the answer is B