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 mx 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).
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