How many moles of nitrogen atoms are present in 0.200 mol of ammonium nitrate, NH4NO3?
Show the answer and explanation
Correct answer
C. 0.400 mol
Principle or equation
The chemical formula NH4NO3 contains two nitrogen atoms per formula unit. Moles of atoms = moles of compound × number of atoms per formula unit.
Why this answer is correct
In one mole of NH4NO3, there are 2 moles of N atoms (one in NH4+ and one in NO3-). Therefore, 0.200 mol × 2 = 0.400 mol N atoms.
Example
In 0.500 mol of Ca(NO3)2, there are 0.500 × 2 = 1.00 mol N atoms.
This published item includes a stored explanation and passed the platform’s publication workflow. It is independent preparation material, not a claim of an official or recalled examination question.