Atoms in a lead-tin solder sample

[babyintel]

hi everyone, i have this homework problem that I'm trying to solve. please help me with this cux I am not good at chem and I'm really stucked and i need to submit this problem online tomorrow ( 04/19/09 by 11pm .thanks a bunch for your help.


How many atoms are present in a 65.0cm^3 sample of plumber's solder, a lead–tin alloy containing 67% Pb by mass and having a density of 9.4 g/cm^3?

 

[CompuChip]

Welcome to PF.

I don't know in which time zone you are (it's now 10:20 am here) but that's not a lot of time you have left.

You could start by calculating how many grams of lead and how many grams of tin you have.