افتح حساباً مجانياً لبدء المنهج كاملاً والدروس التفاعلية — يعمل Google أو رقم الهاتف المحمول.
Industrial synthesis of ammonia from N₂ and H₂ — the temperature/pressure trade-off.
Industrial manufacture of sulfuric acid from SO₂ — V₂O₅ catalyst and three stages.
N, P and K fertilizers — production methods and their role in agriculture.
Methods for testing purity and composition of gases in industrial processes.
Chemical preservatives in food — antioxidants and antimicrobials that extend shelf life.