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Question

A scientist found a new compound Y while working on a new experiment. 

He represented the compound Y as Fe(HCO3)3. What is its atomicity?  



Correct Answer
A
16
Your Answer
B
 6
Your Answer
C
8
Your Answer
D
15

Solution

The correct option is A 16

Fe(HCO3)3 has 1 iron atom and within brackets it has 1 carbon, 1 hydrogen and 3 oxygen atoms.

But it indicates that 3 (HCO3) groups are present in the formula. So the number of atoms in the brackets should be multiplied thrice. 

So, (HCO3)3 contains 3 carbon, 3 hydrogen and 9 oxygen atoms.

Adding all of them up, the atomicity comes out to be 16 atoms.

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