Question

The number of atoms of Cr and O are 4.8 x 1010
and 9.6 x1010 respectively. Its empirical formula is -
(1) Cr2o32) Cro2
(3) cr2o4 (4) Cro5​

Answer 1

Answer:

2) CrO2

Explanation:

1) Find the no. of moles using the eq; No. of atoms/Avagadro No.

2) ÷ by the smallest value

3) Form empirical formula

Hope this helps!

Answer 2

The number of atoms of Cr and O in a compound is 4.8×10  ^10

 and 9.6×10  ^10  respectively.

The ratio of the number of atoms of Cr to O is  

9.6×10  ^10 /4.8×10  ^10 =  2:1

​  

 

Its empirical formula is CrO  2

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