of a gas occupies at STP. What is the molecular weight of the gas? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{moles} = 2.8 / 22.4 = 0.125\text{ mol}$. <br>$\text{MW} = \text{mass} / \text{moles} = 5 / 0.125 = 40\text{ g/mol}$.