Question

Determine the empirical formula of an oxide of nitrogen containing 70% of oxygen if the relative molecular mass of the oxide is 92 deduce it's molecular formula

Answer 1

Answer on Question #72194 - Chemistry - General Chemistry

Question:

Determine the empirical formula of an oxide of nitrogen containing 70% of oxygen if the relative molecular mass of the oxide is 92 deduce it's molecular formula

Solution:

Let's first calculate the stoichiometric ratio of elements in the oxide:

As we know, the molar mass of unknown oxide is: $M(N_{x}O_{2x}) = 92$ g/mol.

$$92 = (15.999 * 2.05 + 14.067 * 1) * x$$ $$x = 1.96 \cong 2$$

Answer: molecular formula of nitrogen oxide is $N_2O_4$.

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