Organik va fizikaviy kimyo kafedrasi

MODDA MIQDORI

1.1. Sulfat kislotaning (H₂SO₄) nisbiy molekulyar massasini hisoblang.

Yechish. Masalani yechish uchun (1.2) formuladan foydalanamiz:

M_r(H₂SO₄)=A_r(H)+A_r(S)+A_r(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 m_x ni topamiz:

kg.