Uy » Online olimpiada » Kimyo olimpiada » 9-sinf Kimyo olimpiada №4 Kimyo olimpiada 9-sinf Kimyo olimpiada №4 InfoMaster Yanvar 5, 2023 660 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 2 0 12345678910111213141516171819202122232425 Vaqtingiz tugadi! 9-sinf Kimyo olimpiada №4 03.01.2023 yil oo.uzedu.uz Online olimpiada savollari! 1 / 25 CrO42- + xH2O + ye- → [Cr(OH)6]3- + zOH- yarim-reaksiyadagi x, y, z koeffisientlarni aniqlang. (uchala koeffisient to‘g‘ri bo‘lgandagina javob inobatga olinadi). x = 4, y = 3, z = 2 x = 3, y = 4, z = 2 x = 4, y = 2, z = 3 x = 2, y = 3, z = 4 2 / 25 Galogenid kislotaning 1,4 M li eritmasining titri 113,4 mg/ml ga teng. Galogenid kislotani aniqlang. HCl HF HBr HJ 3 / 25 Biror bir tuzning 70°C dagi eruvchanlik koeffitsiyenti uning 50°C dagi eruvchanlik koefsiyentidan 1,5 barobar ko’p. Agar shu tuzning 70°C dagi to’yingan 290 g eritmasi 50°C ga qadar sovitilganda 30 g tuz cho’kmaga tushishi ma’lum bo’lsa, shu tuzning 70°C dagi eruvchanlik koeffitsiyentini aniqlang. 45 30 20 60 4 / 25 1,00 gr Mg(NO₃)₂·xH₂O kristallogidrati 550 °С da qizdirildi, natijada 0,217 gr qattiq qoldiq hosil bo`ldi. Kristallogirdatdagi х ni aniqlang. 1 2 4 6 5 / 25 N₂(g) + ₃H₂(g) →₂NH₃ (g) ushbu jarayonda 11,2 dm³ (n.sh.) azot va 1,0 gr vodorod ishlatildi va bunda 0,25 mol ammiak ajratib olindi. Reaksiya unumini aniqlang. 33% 50% 75% 25% 6 / 25 C B A D 7 / 25 D C A B 8 / 25 D B C A 9 / 25 D C B A 10 / 25 B D C A 11 / 25 D C B A 12 / 25 D C B A 13 / 25 A D C B 14 / 25 D B A C 15 / 25 A D B C 16 / 25 D C A B 17 / 25 A B C D 18 / 25 D C B A 19 / 25 B A C D 20 / 25 D C B A 21 / 25 B A C D 22 / 25 A C D B 23 / 25 C B D A 24 / 25 A B D C 25 / 25 C D B A 0% Author: InfoMaster Foydali bo'lsa mamnunmiz
