If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the number of ammonia molecules dissolved in solution?

Question

Quizplus · Accepted Answer

The molar mass of ammonia (NH₃) is 14.01 (N) + 3*1.01 (H) = 17.03 g/mol. To find the number of moles of NH₃ in 5.00 g, divide the mass by the molar mass: 5.00 g / 17.03 g/mol = 0.2937 mol. The number of molecules in a mole is Avogadro's number, 6.022 x 10^23. Therefore, the number of ammonia molecules is 0.2937 mol * 6.022 x 10^23 molecules/mol = 1.77 x 10^23 molecules.

If 500 G of Ammonia,NH₃,is Dissolved in 50