How many atoms of lithium are there in 3.45 moles?

1 Answer
Mar 10, 2016

Answer:

#"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