Question #544a2

1 Answer
Kathryn Bell
Nov 1, 2017

Use Avogadro's Number to calculate the number of atoms in a mole

Explanation:

Avogadro's Number = #6.0221409 xx 10^23 mol^-1#

Avogadro's Number tells you the number of atoms in 1 mole of any element. To calculate the number of atoms, you simply multiply the number of moles you have by Avogadro's number:

Number of atoms = Number of Moles x Avogadro's Number

Worked example

How many atoms of Li in 2.9 moles of Li?

Number of atoms of Li = #2.9 mol xx (6.0221409 xx 10^23 mol^-1)#
Number of atoms of Li = #1.7464208 xx 10^24#

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