How many molecules of #"BF"_3"# are in #1.25# moles?

1 Answer
Meave60
Nov 23, 2014

#"1.25 mol BF"_3"# contains #7.53xx10^(23)# molecules.

Explanation:

I mole of anything is #6.022xx10^(23)# pieces or particles of it. So 1 mole of boron trifluoride contains #6.022xx10^(23)# molecules.

To calculate the number of molecules in 1.25 moles of boron trifluoride, multiply the given moles by #6.022xx10^(23)# #"molecules/mol"#.

#1.25color(red)cancel(color(black)("mol BF"_3))xx(6.022xx10^(23)"molecules")/(1color(red)cancel(color(black)("mol")))=7.53xx 10^(23)# molecules #"BF"_3#

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