The density of nickel (Ni) is 8.90 g/mL and the cell volume is 4.38 ✕ 10−23 mL. Determine the number of atoms in the unit cell.?
(Because there cannot be a part of an atom in a unit cell, we must round the number of atoms to the nearest whole number.)
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just like this problem
https://answers.yahoo.com/question/index?qid=20170...
we setup this equation
.. 8.90g.. .. 1 mol... .6.022x10^23 atoms.. 4.38x10^-23 mL
----- ----- x ----- ----- x ---- ----- ----- ---- ----- x ---- ---- ----- ----- --- = 4 atoms / cell
.. 1 mL... . 58.69g.. .. .... .. 1 mol.. .... ... ... ... ..1 cell