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#1
08-29-07, 12:36 PM
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Some chemistry stuff...
I am having some problems with my chem review....I am missing notes from my chem classes and are not sure what I am doing right now. I received a lot of help from you last time, and I am hoping you can point me in the right direction this time as well.
here are the questions that have to be answered: 1) How would you make 100 ml of a 40% polyethylene glycol? 2) How would you make 47 ml of 7% solution of sodium chloride? 3) How are 200 ml of 0.3 M NaCl prepared? (MW= 58.44) 4) You have the following solutions 2.5M MgSO4 and 5.0M CaCl2 You want 25 ml of 0.5M Cacl2 and 1.0M MgSO4 any input is welcome. Thanks. 
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#3
08-29-07, 06:50 PM
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i am sure someone here knows the answers. i on the other hand am as dumb as they come.
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