What mass of ammonia,NH₃,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl₃F?

Question

Quizplus · Accepted Answer

To find the mass of ammonia that contains the same number of molecules as 3.00 g of trichlorofluoromethane (CCl3F), we first calculate the molar mass of CCl3F and NH3, then use Avogadro's number to equate the number of molecules.Molar mass of CCl3F = 12.01 (C) + 3*(35.45) (Cl) + 19.00 (F) = 137.36 g/molMolar mass of NH3 = 14.01 (N) + 3*(1.008) (H) = 17.03 g/molNumber of moles of CCl3F = mass / molar mass = 3.00 g / 137.36 g/mol = 0.02185 molesSince the number of molecules is the same, the moles of NH3 will also be 0.02185.Mass of NH3 = moles * molar mass = 0.02185 moles * 17.03 g/mol = 0.372 g, which is closest to option B, 0.331 g.

What Mass of Ammonia,N H3,contains the Same Number of Molecules

What Mass of Ammonia,NH₃,contains the Same Number of Molecules