Which of the following has the largest number of atoms?

Options

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

Answer

A

Explanation

0.5 g-atom Cu `=0.5xx6.02xx10^(23)`
`=3.01xx10^(23)` Cu atom
0.635 g of Cu `=(0.635)/(60.5)xx6.02xx10^(23)`
`=6.02xx10^(21)` Cu atom
0.25 moles Cu `= 0.25xx6.02xx10^(23)`
`=1.5xx10^(23)` Cu atom
1 g Cu `=(1)/(63.5)xx6.02xx10^(23)`
`=9.48xx10^(21)` Cu atom