MODDA MIQDORI
1.1. Sulfat kislotaning (H2SO4) nisbiy molekulyar massasini hisoblang.
Yechish. Masalani yechish uchun (1.2) formuladan foydalanamiz:
Mr(H2SO4)=Ar(H)+Ar(S)+Ar(O)=2.1+1.32+4.16=98 m.a.b.
1.2. Natriy pirofosfatning (Na4P2O7) nisbiy molekulyar massasini hisoblang. (Javob: 266 u.b.).
1.3. Natriy pirofosfat (Na4P2O7·10H2O) kristalgidratining nisbiy molekulyar massasini hisoblang. (Javob: 446 u.b.).
1.4. Vodorod atomining nisbiy atom massasini hisoblang.
Yechish. Masalani yechish uchun (1.1) formuladan foyda-lanamiz:
m.a.b.
1.5. Kislorod atomining nisbiy atom massasini hisoblang. (Javob: 16,052 m.a.b.).
1.6. Natriy atomining massasini toping.
Yechish. Masalani yechish uchun (1.1) formuladan foydalanamiz va mx ni topamiz:
kg.
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