If 1021 molecules are removed from 200mg of , then the number of moles of left are — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

Molar mass of 2 44 CO g Given mass=200 mg=0.2g Number of moles = 0.2 1 0.004545 mole 44 220 Since 23 6.023 10 x molecules are present in 1 mole of 2 CO . 21 21 23 2 1 1 10 molecules are present in = 1 10 6.023 10 = 0.0016603 mole Hence number of moles of CO left =0.00454-0.00166 x xx x 3 = 2.885 10 x Thus, correct option is (a). Percentage Composition ; Empirical & Molecular Formula