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Calculate mass of sodium which contains ...

Calculate mass of sodium which contains same number of atoms as are present in `4 g` of calcium (Atomic weight `Na = 23`, atomic weight `Ca = 40`)

Text Solution

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a. `40 g of Ca = 6.023 xx 10^(23)` atoms
`4 g of Ca = 6.023 xx 10^(22)` atoms
b. `23 g of Na = 6.023 xx 10^(23)` atoms
`:. 6.023 xx 10^(23)` atoms of `Na`
`= 23 g`
`= 6.023 xx 10^(22)` atoms of `Na`
`= 2.3 g`
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