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One atom of an element weighs 6.644xx10^...

One atom of an element weighs `6.644xx10^(-23)g`. Calcualte the number of gram atoms in 40kg of it.

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Atomic mass of the element
=Mass of one atom `xx0.62xx10^(23)`
`=6.644xx10^(-23)xx6.02xx10^(23)=40g`
40g=40000g
No. of gram atoms `=("Mass of the element in grams")/("Atomic mass in grams")`
`=(40000)/(40)=1000`
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