How many molecules of calcium are in #"463.78 g"# of calcium?

1 Answer
Truong-Son N.
Oct 12, 2017

Calcium ATOM has a molar mass of #"40.078 g/mol"#. Therefore:

#463.78 cancel"g Ca" xx "1 mol"/(40.078 cancel"g Ca")#

#=# #"11.572 mols Ca atom"#

As a result, we have this many atoms:

#11.572 cancel"mols Ca" xx (6.0221413 xx 10^(23) "any atom ever")/(cancel"1 mol any atom ever")#

#= ulcolor(blue)(6.9688 xx 10^24 "atoms Ca")#

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