How many atoms of lithium are there in 3.45 moles?

1 Answer
Meave60
Mar 10, 2016

"3.45 moles Li" contains 2.08xx10^24"atoms".

Explanation:

The relationship between atoms and moles is:

1 "mole atoms"=6.022xx10^23 "atoms"

In order to determine how many atoms occupy a given number of moles, multiply the given moles by 6.022xx10^23"atoms/mole".

In the case of 3.45 moles lithium (Li):

3.45cancel"mol Li"xx(6.022xx10^23"atoms Li")/(1cancel"mol Li")=2.08xx10^24 "atoms Li" rounded to three significant figures

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