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Density of Li is 0.53"g cm"^(-3). The ed...

Density of Li is `0.53"g cm"^(-3)`. The edge length of Li is `3.5Å`. Find the number of Li atoms in a unit cell `(N_(0)=06.023xx10^(23),M=6.94)`.

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The aim is to find Z in the formula ` p = ( Z xx M)/ (a^(3) xx N_(0)) `
` Z= ( p xx a^(3) xx N_(0)) /M = ( 0.53 g cm ^(-3) xx ( 3.5 xx 10^(-8) cm)^(3) xx ( 6.023 xx 10^(3) mol^(-1)))/(6.94 " g mol"^(-1)) = 1.97 = 2 `
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