How do you find the number of molecules or ions of 6.022 mol #O_2#?

1 Answer
Meave60
Feb 14, 2016

#6.022"mol O"_2=3.626xx10^24"molecules O"_2"#

Explanation:

Since #"O"_2"# is a molecular substance, you will determine the number of molecules in 6.022 mol #"O"_2"#.

Known

#"1 mol O"_2=6.022xx10^23 "molecules O"_2"#

Solution

Multiply the given moles of #"O"_2"# times #6.022xx10^23"molecules O"_2"/mol O"_2#.

#6.022cancel"mol O"_2xx(6.022xx10^23"molecules O"_2)/(1cancel"mol O"_2)=3.626xx10^24"molecules O"_2"# (rounded to four significant figures)

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