Homework Help: Chem

Posted by Rebekah on Sunday, September 26, 2010 at 10:48pm.

(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109?
%
(c) If the mass of Ag-107 is 106.905, what is the mass of Ag-109?
amu

I really need help. Can u say the answer then explain how you got it?

Thanks:)

Chem - Rebekah, Sunday, September 26, 2010 at 10:51pm
Oops I just need c
Chem - DrBob222, Sunday, September 26, 2010 at 11:05pm
106.905(0.5184) + massAg109(1-0.5184) = mass Ag from periodic table.
Solve for the only unknown which is mass Ag 109.
Remember the isotopes are averaged to obtain the atomic mass found in the periodic table.
Chem - KELLY, Sunday, September 26, 2010 at 11:11pm
THE FOLLOWING SOLUTIONS AREMIXED TOGETHER: 121mL OF 1.54 M AgNO3 AND 45mL OF 1.07 M K2SO4
CALCULATE THE MOLAR CONCENTRATION OF Ag+ IONS IN THE FINAL SOLUTION

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