[MAchemi]

This is the problem.  Calculate the grams of solute required to make the following solution.  2.3 L of normal saline solution (0.90% NaCl (m/v))

My book, notes, and all wbsites I have found say that m/v is grams over 100 ml.  I tried .9 grams over 100 ml, and multiplied by 2300 ml, I tried .9g/1 L times 2.3 L, and several other variations.  They all come to 2.07, or 207 etc.  I tried these, and i tried changing the number of significant figures, but none are right.  This is webassign homework, and it is due sunday may 2nd at midnight, so please, i need help before then!

[Borek]

Try CASC (see footer). Especially read remarks on %w/v concentration in the program help.

207 are proper digits, the question is - where to put decimal point? You need 0.9g per 100 mL, how many 100 mL is in 2300 mL?

[MAchemi]

That's great-I got it right!  20.7!  Thanks-that's a great site!