A highly volatile gaseous compound composed entirely of nitrogen and hydrogen contains exactly (by m — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
A highly volatile gaseous compound composed entirely of nitrogen and hydrogen contains exactly $12.5\%$ (by mass) of hydrogen. The vapour density of the compound relative to hydrogen gas ($H_2$) is $16$. Which of the following statements accurately describe this compound?
Answer: A,B,C,D
💡 Solution & Explanation
Step 1: Find EF. %N $= 100 - 12.5 = 87.5\%$. Moles N $= 87.5 / 14 = 6.25$. Moles H $= 12.5 / 1 = 12.5$. Ratio N:H $= 6.25 : 12.5 = 1:2$. EF is $NH_2$ (Statement A). Step 2: Molar mass $= 2 \times \text{Vapour Density} = 2 \times 16 = 32\text{ g/mol}$ (Statement B). Step 3: Find $n$. EF Mass of $NH_2 = 14 + 2 = 16$. $n = 32 / 16 = 2$. MF $= (NH_2)_2 = N_2H_4$ (Statement C). Step 4: $N_2H_4$ is the chemical formula for Hydrazine (Statement D).
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