10-sinf olimpiada savollari

kimyo fanidan 10-sinflar uchun olimpiada savollari 1.karbonat angidrit bitta molekulasining grammlarda ifodalangan massasini toping? a)7.31*10-23 b)7.31*10-24 c)7.31*10-27 d)5.73*10-23 2.oq fosfor bug`larining vodorodga nisbatan zichligini toping a)1.31 b)2.15,5 c)3.77,5 d)4.46,5 3. natriy sanoatda quyidagi qaysi usulda olinadi? a) domna pechlarda tuzlarni eritish orqali b) kristall holidagi sodani qizdirish orqali c) aluminotermiya usulida d) osh tuzi eritmasini elektroliz qilish orqali 4.50 ml 0.5m li kalsiy xlorid eritmasini 0.2 m natriy korbonat eritmasi bilan to`liq reaksiyaga kirishishi uchun qancha hajm natriy karbonat kerak? a)50ml b)100ml c)75ml d)125 ml 5. 2g h2 va 16g o2 aralashmasining hajmi (n.sh.da) nechaga teng? a) 11.2 l b)44.8 l c)22.4 l d)33.6 l 6.8g mis va 8 g oltingugur...

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