Uy » Online olimpiada » Kimyo olimpiada » 9-sinf Kimyo olimpiada №4 Kimyo olimpiada 9-sinf Kimyo olimpiada №4 InfoMaster Yanvar 5, 2023 634 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 = 2, z = 3 x = 2, y = 3, z = 4 x = 3, y = 4, z = 2 x = 4, y = 3, z = 2 2 / 25 MeSO4 o’zining massasidan 2 marta ko’p suvda eritilganda eritmadagi SO42- anionining massa ulushi 1/5 ga teng bo’ldi. Metallni aniqlang. Cu Cd Mg Fe 3 / 25 Kaliy permanganat molekulasida nechta sigma va nechta pi bog’ borligini aniqlang. 10;6 8;4. 5;3 ; 4;2; 4 / 25 reaksiyada X - : elektron neytron β-zarracha α-zarracha 5 / 25 20 ml 0,10 M li Na₂SO₄ ni 50 ml 0,30 M Na₃PO₄ eritmasi bilan aralashtirilganda hosil bo`ladigan eritmadagi Na+ ionlarining konsentrasiyasini aniqlang. 0,48 M 0,15 M 0,70 M 0,24 M 6 / 25 C D A B 7 / 25 B D A C 8 / 25 A D C B 9 / 25 C B A D 10 / 25 A C D B 11 / 25 D C B A 12 / 25 D C B A 13 / 25 A B D C 14 / 25 B D A C 15 / 25 C D B A 16 / 25 B A D C 17 / 25 D C A B 18 / 25 D C A B 19 / 25 D B A C 20 / 25 D B C A 21 / 25 B C A D 22 / 25 D B A C 23 / 25 A B C D 24 / 25 C D A B 25 / 25 D A C B 0% Author: InfoMaster Foydali bo'lsa mamnunmiz
