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There are 5.6 xx 10^(24) unit cells in 1...

There are `5.6 xx 10^(24)` unit cells in 1 kg of metal for which the density is `7.5 g//c c`. Calculate the side length of the cubic unit cell of the lattice of the metal. (Use `((100)/(42))^(1//3) = 2.877)` Express your answer in `Å`, by applying appropriate approximation.

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