A scientist while working on an experiment found a compound with chemical formula $F e (H C O_{3})_{3}$ . What is its atomicity?

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Solution

The correct option is C 16
Atomicity of a molecule refers to the total number of atoms that constitute that molecule.

$F e (H C O_{3})_{3}$ has iron, carbon, hydrogen and oxygen atoms. It indicates that there are three $(H C O_{3})$ ions and one $F e$ ion.

$(H C O_{3})_{3}$ has 3 carbon, 3 hydrogen and 9 oxygen atoms. Adding all of them together along with 1 iron atom gives a total of 16 atoms. Hence, atomicity of $(H C O_{3})_{3}$ is 16.

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