What is the mass in grams of #5.56 X 10^22# lead atoms?

1 Answer
anor277
Jan 25, 2017

Well, #6.0221xx10^23# individual lead atoms have a mass of #207.2*g#.

Explanation:

So we take the quotient,

#(5.56xx10^22" atoms")/(6.022xx10^23*"atoms"*mol^-1)# #xx207.2*g*mol^-1# #=#

#"How many grams?"#

This idea of mass equivalence, of a mass representing a GIVEN number of atoms or molecules, is central to chemistry, and it is worth getting right. Using this concept, for a given reactant, we can predict the mass of products likely to be observed. Over your studies in chemistry, you will do many such problems.

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