Determine the number of ammonia molecules in 4.85 g of ammonia. (N_A = 6.022 × 10²³ mol^-1) A) 2.92 × 10²³ molecules B) 4.73 × 10^-25 molecules C) 1.24 × 10²³ molecules D) 5.83 × 10^-24 molecules E) 1.71 × 10²³ molecules

Question

Quizplus · Accepted Answer

To find the number of molecules, first calculate the number of moles of ammonia (NH₃) using its molar mass (17.03 g/mol). Moles = 4.85 g / 17.03 g/mol = 0.285 moles. Then, multiply by Avogadro's number: 0.285 moles × 6.022 × 10²³ molecules/mol = 1.71 × 10²³ molecules.

Determine the Number of Ammonia Molecules in 4