Posted by **Johnny** on Sunday, October 7, 2007 at 12:27am.

How many grams are there in 2.3 x 10^24 atoms of silver?

I need to use dimensional analysis, and I'm not sure of the conversions I'd need to solve this problem.

Thank you!

- Chemistry -
**DrBob222**, Sunday, October 7, 2007 at 2:02pm
1 mol Ag = 107.??. You need to look up the atomic mass to get an exact number. There are 6.022 x 10^23 atoms in this mass of Ag. so the conversion is either

6.022 x 10^23 atoms/1 mol OR

1 mol/6.022 x 10^23 atoms.

Convert 2.3 x 10^24 atoms to mols Ag using the appropriate factor above. Then convert mols Ag to grams silver using either of the following. I suspect you are to use dimensional analysis for this part, also, although you know mols x molar mass = grams.

107.?? g Ag/1 mol OR

1 mol/107.?? g Ag.

Post your work if you get stuck.

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