☰ Contents · Chemistry

Nitrogen. Ammonia and ammonium salts

Lessons 38–39 · 2 lessons · I.R. Asqarov, K. G‘opirov, N.X. To‘xtaboyev. Chemistry Grade 8, revised 4th edition. “Yangiyul Poligraph Service”, Tashkent, 2019
Answers are for parents and teachers.
1
Mass fraction of nitrogen in NH₄NO₃ (%). Aᵣ: N 14, H 1, O 16.
2
Volume of O₂ needed for 20 l NH₃ (4NH₃ + 5O₂ → 4NO + 6H₂O)?
3
How many grams of nitrogen combine with 144 g Mg (3Mg + N₂ → Mg₃N₂, Aᵣ(Mg) = 24)?
4
Write the net ionic equation of NH₄Cl + NaOH → NaCl + NH₃ + H₂O.
5
Why is ammonia made at high pressure in industry?