How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol. A) 9.83 × 10²⁰ C₂H₄ molecules B) 7.74 × 10²⁶ C₂H₄ molecules C) 2.71 × 10²⁰ C₂H₄ molecules D) 3.69 × 10²³ C₂H₄ molecules E) 4.69 × 10²³ C₂H₄ molecules

Question

Quizplus · Accepted Answer

To find the number of molecules, first convert 45.8 mg to grams (0.0458 g), then divide by the molar mass (28.05 g/mol) to find moles. Multiply by Avogadro's number (6.022 × 10^23) to find molecules: (0.0458 / 28.05) × 6.022 × 10^23 ≈ 9.83 × 10^20 molecules.

How Many C2H4 Molecules Are Contained in 45

How Many C₂H₄ Molecules Are Contained in 45