# How to calculate the number of molecules in 1 kg of aluminum?

How to calculate the number of molecules in 1 kg of aluminum?

and the number of molecules in 1kg of brass?

thanks :-)

### 1 Answer

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- 9 years agoBest Answer
no. of molecules/ions/atoms (particles) in 1mol of particles is always 6.022 x 10^-23 ,this is the Avogadro ` number as you probably know

so first find the no. of moles of Al (mass/molar mass) then multiply be Avogadro number!

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