Ammonia
\( \mathrm{NH_3} \) · Molecular weight 17 · Lighter than air
Say where ammonia is found
Describe its lab preparation
Test for it
List its properties and uses
Explain the fountain experiment
Free: nitrogenous matter decaying without oxygen
Combined: ammonium chloride, ammonium sulphate
Lavoisier made it by heating \( \mathrm{NH_4Cl} \) and \( \mathrm{Ca(OH)_2} \)
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