1-amaliy mashg’ulot Kimyoviy tushunchalar

2. Natriy pirofosfatning (Na₄P₂O₇) nisbiy molekulyar massasini hisoblang. (Javob: 266 u.b.).

3. Natriy pirofosfat (Na₄P₂O₇·10H₂O) kristalgidratining nisbiy molekulyar massasini hisoblang. (Javob: 446 u.b.).

4. Vodorod atomining nisbiy atom massasini hisoblang.

Yechish. Masalani yechish uchun (1.1) formuladan foyda-lanamiz:

m.a.b.

5. Kislorod atomining nisbiy atom massasini hisoblang. (Javob: 16,052 m.a.b.).

6. Natriy atomining massasini toping.

Yechish. Masalani yechish uchun (1.1) formuladan foydalanamiz va m_x ni topamiz:

kg.

7. Nikel atomining massasini hisoblang. (Javob:97,99·10^-27 kg).

8. Temir atomining massasini hisoblang. (Javob:92,76·10^-27kg).

9. Azot atomining massasini hisoblang. (Javob:23,22·10^-27 kg).

10. 46 g massali natriyda qancha natriy moddasi bor?

Yechish. Masala (1.4) tenglama asosida yechiladi:

mol.

11. 4,4 g massali kalsiydagi modda miqdorini toping. (Javob: 0,11 mol).

12. 11,2 g massali temirda qancha temir moddasi bor? (Javob: 0,2 mol).

13. 14,2 g (NH₄)₂C₂O₄^.H₂O dagi modda miqdorini toping. (Javob: 0,1 mol).

14. 4,86 g kaliy geksaxloroplatinat (K₂PtCl₆) dagi modda miqdorini toping. (Javob: 0,01 mol).