How many atoms are in 187 grams of NH3?

Answer 1

Hi, Nicolle,

First we need to find the molar mass of NH₃. N is 14.0 and each H is 1.0, so it's molar mass is 17.0 g/mole.. Now determine the number of moles of NH₃ by dividng the grams of NH₃ by its molar mass.

We have 11.0 moles of NH₃ By definition, one mole of ANYTHING is 6.02x10²³ items of that thing. So 11.9 moles*(6.03x10²³atoms/mole)= 7.61x10²⁴ atoms of NH₃.

Bob