Which of the following gases will have the same density at STP? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{Density} = \text{Molar mass} / 22.4$. <br>Molar masses: $N_2 = 28$, $CO = 12+16=28$, $C_2H_4 = 24+4=28$. <br>Since their molar masses are identical, their densities at STP are the same.