Nazorat shakli: Test sinovi Avogadro doimiysini ifodalovchi sonni ko‘rsating

3- NAZORAT ISHI

Mavzu: Katta, kichik davr elementlarining tuzilishi, yadro reaksiyalari asosida masalalar yecha olishni tekshirish

Nazorat shakli: Yozma ish

I variant

1. Kimyoviy elementlarning yadro zaryadi ortib borgan sari davrlarda xossalari qay tartibda o‘zgarishini yozing. Guruhlardagi o‘zgarishni ham.

   
   

2. 300 ml 0,2 molar eritma tayyorlash uchun necha gramm NaNO₃ olish kerak?

   
   

3. Tarkibida 2,4% vodorod, 39% oltingugurt, 58,6% kislorod tutgan birikmaning formulasini aniqlang.

   
   

4. Quyidagi reaksiyani izohlang.

   
   

+ ¹₀n→ +
II variant

1. Tabiiy argon ³⁶Ar, ³⁸Ar va ⁴⁰Ar izotoplarining aralashmasidan iboratbo‘lib:

³⁶Ar - 0,3%, ³⁸Ar - 0,7%, ⁴⁰Ar - 99% ni tashkil etadi. Tabiiy argonning o‘rtacha atom massasini aniqlang.

2. H₂SO₄ni 2 H eritmasidan 100 ml tayyorlashni hisoblang.

3. Quyidagi kislotalardagi kislota hosil qiluvchi elementning valentligini aniqlang:

H₂S, H₂SO₃, H₂SO₄, Н₂СrO₄, HMnO₄.

4. Quyidagi reaksiyani izohlang:

+  → +
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_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Nazorat 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