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Calculate mass of 3.011 xx 10^(23) numbe...

Calculate mass of `3.011 xx 10^(23)` number of `N_(2)` molecules (mass from number) .

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The number of moles , n = `("given number of particles")/("Avogadro number") = (N)/(N_(0))`
`= (3.011 xx 10^(23))/(6.022 xx 10^(23))`
`implies m = M xx n = 14 xx (3.011 xx 10^(23))/(6.022 xx 10^(23))`
`=14 xx 0.5 = 7g `
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