9-sinf Kimyo olimpiada №4 Yanvar 5, 2023Yanvar 5, 2023 da chop etilgan InfoMaster tomonidan 9-sinf Kimyo olimpiada №4 ga 1 fikr bildirilgan 0 12345678910111213141516171819202122232425 Vaqtingiz tugadi! 9-sinf Kimyo olimpiada №4 03.01.2023 yil oo.uzedu.uz Online olimpiada savollari! 1 / 25 Moddaning kimyoviy xossalarini o‘zida saqlovchi eng kichik zarra bu - … yadro molekula atom klaster 2 / 25 Teng hajmda olingan kislorod va ozon massalari bir – biridan 480 g ga farq qilsa, aralashmadagi kislorod massasini(g) hisoblang. 960 640 320 1280 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) ²³⁰Th ²³²Pa ²⁷⁶Rn ²³⁰Ac 4 / 25 Qaysi qattiq modda 25°С da suyultirilgan xlorid kislota bilan reaksiyaga kirishib havodan zichroq bo`lgan gazni hosil qiladi. NaBr Zn Pb(NO₃)₂ NaHCO₃ 5 / 25 Fosfatli yoki kompleksli o`g`itlar tarkibiga kiruvchi quyidagi moddalardan qaysi birida fosforning massa ulushi eng ko`p? NH4H2PO4 CaHPO4×2H2O Ca5(PO4)3F (NH4)2HPO4 6 / 25 C D B A 7 / 25 D B C A 8 / 25 C D A B 9 / 25 B D A C 10 / 25 D A B C 11 / 25 B A D C 12 / 25 A C D B 13 / 25 D B C A 14 / 25 C D A B 15 / 25 B C D A 16 / 25 A D B C 17 / 25 C A D B 18 / 25 D A C B 19 / 25 D C A B 20 / 25 D A B C 21 / 25 C B A D 22 / 25 C B A D 23 / 25 B A D C 24 / 25 D C A B 25 / 25 B D A C 0% Author: InfoMaster Kimyo olimpiada
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