What is the mass of 3.00 mole of NH3?
Molar mass of NH3,
MM = 1*MM(N) + 3*MM(H)
= 1*14.01 + 3*1.008
= 17.034 g/mol
use:
mass of NH3,
m = number of mol * molar mass
= 3 mol * 17.03 g/mol
= 51.1 g
Answer: 51.1 g
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