Fwd: Re: Lab 2 question

[robert zellmer]

Here's another question.  I believe I've covered this previously but it's
worth addressing it again.

"When calculating number of moles of solute from molarity
by multiplying by kg of solvent, do we use the unrounded
number we calculated for grams of solvent or do we use the
number we rounded after taking density sig figs into account?"

You should carry extra digits from one step in a series of calculations
to the next step.  In your sample calcs, report the number with extra
digits and then with the correct # of s.f.  In your Presentation of Data
you always report the correct s.f.

Dr. Zellmer