Uy » Online olimpiada » Kimyo olimpiada » 9-sinf Kimyo olimpiada №4 Kimyo olimpiada 9-sinf Kimyo olimpiada №4 InfoMaster Yanvar 5, 2023 664 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 Ozon va kislorod aralashmasining o‘rtacha molyar massasi 40 g/mol bo‘lsa, undagi ozonning hajmiy ulushini aniqlang. 60% 80% 50% 70% 2 / 25 Teng hajmda olingan kislorod va ozon massalari bir – biridan 480 g ga farq qilsa, aralashmadagi kislorod massasini(g) hisoblang. 640 320 1280 960 3 / 25 238U → E + x β+ y 0n1. ushbu yadro reaksiyada x/y ning qiymati 0,375 ga teng bo’lsa, noma’lum element izotopini aniqlang. (x+y=11) ²³²Pa ²³⁰Th ²³⁰Ac ²⁷⁶Rn 4 / 25 Agar quyidagi reaksiya butun koeffisentlar bilan tenglashtirilsa, H+ oldidagi koeffisent nechaga teng? 14 7 4 3 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. 6 2 4 1 6 / 25 C B D A 7 / 25 C D B A 8 / 25 C A D B 9 / 25 D A C B 10 / 25 D B C A 11 / 25 C D A B 12 / 25 B A D C 13 / 25 A D B C 14 / 25 D A C B 15 / 25 A B C D 16 / 25 B A C D 17 / 25 C A D B 18 / 25 C B A D 19 / 25 B C D A 20 / 25 B D C A 21 / 25 C D A B 22 / 25 D B A C 23 / 25 B A D C 24 / 25 B A D C 25 / 25 D C B A 0% Author: InfoMaster Foydali bo'lsa mamnunmiz
