Question

What is the requirement of writing molecular formulae of different compounds? How r the molecular formulae of the compounds written ?

Answer 1

When it comes to writing a molecular formula of different compounds,you will need to use a set of prefixes to indicate the number of atoms of each element in the molecule. let write a formula of nitrogen dioxide.

There are two elements in this compound namely nitrogen and oxygen.

the absence of prefix on nitrogen and the "di"(one of the prefixes) in front of the oxide indicates 2atoms of oxygen. So the formula is NO2

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