Question

Which of the following has largest number of atoms :

A) 1g O2
B) 1g Cl2
C) 1g B
D) 1g Au

Explain how?

Answer 1

cl2 because has highest atomic number

Answer 2

A) 1g O2
-----------------------------------------------------------------------------------------------------

32 ------------ 6.022 x 10²³
1 --------------?

6.022 x 10 ²³  x 1 
         32

= 0.188 x 10²³

----------------------------------------------------------------------------------------------------------
1g of Cl2
------------------------------------------------
71 ---------------- 6.022  x 10²³
1------------------- ?

6.022 x 10 ²³ x 1
        71

0.0848 x 10²³

-------------------------------------------------------------------------------------------------
1g of B
----------------------------------
5 -------------- 6.022 x 10²³
1---------------- ?

6.022 x 10 ²³ x 1 
          5

1.2 x 10 ²³

-------------------------------------------------------------------------------------------------
1g of Au
----------------------
79 --------------- 6.022 x 10²³
1-----------------?

6.022 x 10 ²³ x 1
        79

0.076 x 10 ²³
------------------------------------------------------------------------------------------------
so 1g of B contains more no of atoms