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Question

Which of the following is NOT an example of an empirical formula?


A
NO2
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B
N2O5
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C
N2O4
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D
N2O3
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Solution

The correct option is D $${ N }_{ 2 }{ O }_{ 4 }$$
An empirical formula is the simplest whole-number ratio of all atoms in a molecule.
$$i) NO_2 \Rightarrow N:O = 1:2 \Rightarrow \text{Simplest - Empirical}$$
$$ii) N_2O_5 \Rightarrow N:O = 2:5 \Rightarrow \text{Simplest - Empirical}$$
$$iii) N_2O_4 \Rightarrow N:O = 2:4 \Rightarrow \text{ Not Simple - Molecular}$$
$$iv) N_2O_3 \Rightarrow N:O = 2:3 \Rightarrow \text{Simplest - Empirical}$$

Hence, option $$C$$ is correct.

Chemistry

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