The correct sets of empirical formula, molar mass, and molecular formula is CH₄N, 90 g, C₃H₁₂N₃. The correct option is C.
The molecular composition of a compound that gives the proportions (ratios) of the elements that are present in the compound rather than the actual numbers or arrangement of atoms is known as an empirical formula.
CH₄N is methylene, whose molar mass is 90 grams.
Thus, the correct option is C, CH₄N, 90 g, C₃H₁₂N₃.
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