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 Ozon va kislorod aralashmasining o‘rtacha molyar massasi 40 g/mol bo‘lsa, undagi ozonning hajmiy ulushini aniqlang. 50% 60% 80% 70% 2 / 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. 60 45 30 20 3 / 25 Sulfat angidridning parchalanish reaksiyasini to’rt marta orttirish uchun idishning hajmi qanday o’zgarishi lozim. 4 marta kamayishi 4 marta ortishi 2 marta kamayishi 2 marta ortishi 4 / 25 20 l NO va 30 l O₂ aralashtirildi. Moddalar doimiy temperatura va bosimda reaksiyaga kirishdi hamda hamma NO NO₂ ga aylandi. Hosil bo`lgan gazlar aralashmasining hajmi l da qancha? 70 50 40 60 5 / 25 Pirobelonit PbMn₂VO₄OH mineralida vanadiyning oksidlanish darajasi: +1 +3 +2 +5 6 / 25 A B D C 7 / 25 A D B C 8 / 25 C D B A 9 / 25 A D C B 10 / 25 D B A C 11 / 25 C A D B 12 / 25 D A B C 13 / 25 A D B C 14 / 25 B C A D 15 / 25 A D B C 16 / 25 B C A D 17 / 25 C D A B 18 / 25 B A C D 19 / 25 C A B D 20 / 25 C B A D 21 / 25 C A D B 22 / 25 D B C A 23 / 25 B A C D 24 / 25 A B C D 25 / 25 A B C D 0% Author: InfoMaster Foydali bo'lsa mamnunmiz
