1.

The density of solid argon (Ar = 40 g/mol) is 1.68 g/mL at 40 K. If the argon atom is assumed to be a sphere of radius \[1.50\times {{10}^{-8}}\] cm, what % of solid Ar is apparently empty space? (use \[{{N}_{A}}\] = \[6\times {{10}^{23}}\])

A. 35.64   
B. 64.36
C. 74                    
D. none of these
Answer» C. 74                    


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