2 marta kamayadi D)4 marta kamayadi 156g 10%li Naoh eritmasida 46g Na erishidan olingan eritmada ishqor massa ulushi

X₂ 140⁰C dan pastda suv yo'qotsa X₁ ga aylanadi D) X₄ + X₂  etilatsetat

Har qanday bog' hosil bo'lishida energiya ajraladi uzilishida esa yutiladi. N N, H-H, N-H bog' energiyalari mos ravishda 940kJ/mol , 430kJ/mol, 400kJ/mol. N₂+H₂  NH₃ reaksiyada 4 mol NH₃ olinganda qancha energiya ajraladi? A)340kJ B)970kJ C)280kJ D)720kJ

Har qanday bog' hosil bo'lishida energiya ajraladi uzilishida esa yutiladi. N N, H-H, N-H bog' energiyalari mos ravishda 940kJ/mol , X kJ/mol, 400kJ/mol. 1N₂+3H₂  2NH₃ + 170kJ. X ni aniqlang. A)1290kJ B)970kJ C)215kJ D)430kJ

Molyal konsentratsiyasi 25mol/kg bo'lgan NaOH eritmasining protsent konsentratsiyasini aniqlang. A)50% B)25% C)40% D)20%

Molyal konsentratsiyasi 2,5mol/kg bo'lgan Fe₂(SO₄)₃ eritmasining protsent konsentratsiyasini aniqlang. A)50% B)25% C)40% D)20%

KHSO₄ eritmasida dastlabki tuzga nisbatan ioni dissotsialanish darajasi 4 marta kam, K⁺ ga nisbatan ioni 5marta kam bo'lsa, KHSO₄ dissotsialanish darajasini toping. A)80% B)75% C)95% D)90%

KHSO₄ eritmasida dastlabki tuzga nisbatan ioni dissotsialanish darajasi3 marta kam, K⁺ ga nisbatan ioni 4 marta kam bo'lsa, KHSO₄ dissotsialanish darajasini toping. A)80% B)75% C)95% D)90%

Modda eruvchanligi harorat ortganda 3 marta ortdi. 100g suv saqlagan eritmani to'yintirish uchun moddadan 40g eritish talab etilsa, dastlab eruvchanlik qanday bo'lgan? A)20 B)10 C)40 D)60

Modda eruvchanligi harorat ortganda 3 marta ortdi. 100g suv tutgan eritmani to'yintirish uchun moddadan 20g eritish talab etilsa, keyingi eruvchanlik qanday bo'lgan? A)20 B)