1.

Calculate the number of atoms present in 1 Kg of gold.

Answer»

Solution :The atomic MASS of Gold = 197 g `MOL^(-1)`
197 g of gold contains `6.023xx10^(23)` ATOMS of gold.
`:.` 1000 g of gold will contain = `(1 000xx6.023xx10^(23))/197`
= `3.055xx10^(24)` atoms of Gold


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