How many molecules are in 17 amu of ammonia, #NH_3#? Chemistry The Mole Concept The Mole 1 Answer anor277 Jun 25, 2016 Well the mass of #1# #"ammonia molecule"# #=# #(3xx1+14)*"amu"#, so perhaps you could tell us? And from where did I get those numbers? Explanation: And what is the mass of #1# #"mole of ammonia"#? How do we get from #"amu"# to #"grams"#? Answer link Related questions How do you calculate the number of moles from volume? How do you convert grams to mole? Question #258e5 Question #8d48c Why is the mole an important unit to chemists? What's the mole number? How does the mole relate to carbon 12? How does the mole relate to molecules and ions? How do you calculate the moles of a substance? How can I calculate the moles of a solute? See all questions in The Mole Impact of this question 3903 views around the world You can reuse this answer Creative Commons License