Uy » Online olimpiada » Kimyo olimpiada » 9-sinf Kimyo olimpiada №4 Kimyo olimpiada 9-sinf Kimyo olimpiada №4 InfoMaster Yanvar 5, 2023 726 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 Gipotetik reaksiyaning tezligi temperatura 20°C dan 50°C gacha ko‘tarilganida 8 marta oshsa, 50°C dagi tezlikni yana 4 martaga oshirish uchun temperaturani necha °C gacha ko‘tarish kerak? 60°C 80°C 70°C 90°C 2 / 25 NO va N2Ox dan iborat aralashmada kislorodning massa ulushi 40% , NO ning massa ulushi 21,4% bo’lsa, X ni toping. 5 3 2 1 3 / 25 1,25x molyalli eritma hosil qilish uchun 28g kaliy ishqori x molyalli eritmaga qo’shildi. Hosil bo’lgan eritmaning massa ulushini (%) hisoblang. 12.28 26 16.7 21.9 4 / 25 Quyida molekulaning elektron tuzilishi berilgan: CO₂ H₂O N₂O OF₂ 5 / 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 6 / 25 A B D C 7 / 25 B D C A 8 / 25 C B A D 9 / 25 C A B D 10 / 25 D A B C 11 / 25 A B C D 12 / 25 D B A C 13 / 25 A B C D 14 / 25 B D A C 15 / 25 C B A D 16 / 25 A B D C 17 / 25 C B D A 18 / 25 B C A D 19 / 25 D C A B 20 / 25 A C B D 21 / 25 C D A B 22 / 25 C B D A 23 / 25 B C A D 24 / 25 C D B A 25 / 25 B A C D 0% Author: InfoMaster Foydali bo'lsa mamnunmiz
