The percentage of carbon in a hydrocarbon is 80%. If the vapor density is 15, how many atoms of hydr — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$MW = 2 \times 15 = 30$. <br>$\text{Mass of C} = 0.8 \times 30 = 24 \text{ (2 atoms)}$. <br>$\text{Mass of H} = 30 - 24 = 6 \text{ (6 atoms)}$. <br>Formula is $C_2H_6$. Hydrogen atoms $= 6$. [5, 20]