1.

Calculate the number of particle in 46 g of Na atoms (number from mass)

Answer»

Solution :The number of atoms = `("given mass")/("molar mass") xx` Avogadro number
`implies N = (m)/(M) xx N_(0)`
`implies N = (46)/(23) xx 6 * 022 xx 10^(23)`
`implies N = 12* 044 xx 10^(23)`


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