Mass of one atom of an element is 6.645 xx 10^(-23) g. How many mole's of element are there in 0.320 kg?

Mass of one atom of an element is 6.645 xx 10^(-23) g. How many mole's

1.	Mass of one atom of an element is 6.645 xx 10^(-23) g. How many mole's of element are there in 0.320 kg?
Answer» Solution :Mass of 1 MOLE=`6.645xx10^(23)xx6.023xx10^(23)` =40g=1mole Number of MOLES=`("mass")/("atomic mass")` 0.320 kg contaims =`320/40` =8 MOL.