Which of the following has the largest number of atoms?

Options

A. 0.5 g atom of Cu
B. 0.635 g of Cu
C. 0.25 moles of Cu atom
D. 1 g of Cu

Answer

A

Explanation

(i) 0.5 g atom CU = 0.5 mol Cu atoms
(ii) `0.635 g Cu = 0.01 ` mol Cu
(iii) `0. 25 ` mol
(iv) 1 g Cu `- (1)/(63.5) = 0. 016 ` mol Cu. Hence, `0.5 g` atom of Cu contains largest number of atoms.