Mol, Molyar massa va massa

2. Mol, Molyar massa va massa


; ;
n-modda miqdori (mol); Mr-moddaning molekulyar massasi; m-moddaning massasi.

1. Quyidagi moddalarning molekulyar massalarini hisoblang.

O₂, CO₂, NaCl, NaOH, H₂SO₄, H₃PO₄, Al₂(SO₄)₃, CaSO₄, MgCO₃, CaO, Al₂O₃,
K₂Cr₂O₇, KMnO₄, (NH₄)₂SO₄, (NH₄)₃PO₄, C₂H₅OH, (CuOH)₂CO₃, (NH₂)₂CO.
2. Quyidagi moddalarning molekulyar massalarini hisoblang.
K₄[Fe(CN)₆)], K₃[Fe(CN)₆)], Na[Ag(NO₂)₂], K₂[MoF₈], [Cr(H₂O)₂(NH₃)₃Cl]Cl₂,
[Cr(H₂O)₄Cl₂], K₄[TiCl₈], K₂[HgI₄]
3. Quyida berilgan moddalarning miqdorini (mol) hisoblang.
a) 62 g Mg; b) 48 g O₂; c) 1 tonna CaCO₃; d) 1,96 g H₂SO­₄; e) 25,2 g HNO₃
J: a)2,58; b) 1,5; c) 1·10⁴; d) 0,2; e) 0,4.
4. Moddalarning miqdori keltirilgan. Shu moddalarning massasini hisoblang.
a) 0,75 mol CO₂; b) 1,25 mol NaCl; c) 17 mol NH₃
J: a) 33; b)73,125 g; c)289 g
5. Quyidagi moddalarning massalari berilgan shu moddalarning haqiqiy massasini hisoblang. (M_C=1,66·10^-27 kg )
a) 16 g S; b) 56 g N₂; c) 100g CaCO₃; d) 300g HClO₄; e) 8 g SO₃.
6. Moddlarning miqdorlari berilgan. Shu moddalarning massasini va haqiqiy massasini hisoblang. a) 2,25 mol N₂O₅; b) 3,75 mol H₃PO₄; c) 2 mol KMnO₄; d) 8,5 mol SO₃ J: a) 243 g, 1,46·10^-24 kg; b) 367,5 g, 2,2·10^-24 kg; c) 316 g, 1,9·10^-24 kg;
d) 680 g, 4,09·10^-24 kg.
7. Massasi 1,5 mol CO₂ massasiga teng bo’lgan osh tuzi necha mol bo’ladi?
J: 1,128 mol.
8. Miqdori 16g SO₂ ning miqdoriga teng bo’lgan malaxitning ((CuOH)₂CO₃) massasini hisoblang. J: 55,5 g.
9. Massasi 3 mol KMnO₄ massasiga teng bo’lgan kislorodning miqdorini hisoblang. J: 14,8 mol.
10. Massasi 10 mol suvning massasiga teng bo’lgan HCl ning miqdorini hisoblang
J: 4,93 mol.
11. Miqdori 31 g P₄ miqdoriga teng bo’lgan H₃PO₄ ning massasini toping.
J: 24,5 g.
12. Miqdori 58,5 g osh tuzinig miqdoriga teng bo’lgan KCl ning massasini toping.
J: 74,5 g.
13. Massasi 16 mol suvning massasiga to’g’ri keladigan ozon O₃ gazining miqdorini hisoblang. J: 6 mol.
14. Miqdori 6,4g O₂ ning miqdoriga to’g’ri keladigan CO₂ ning massasini hisoblang. J: 8,8 g.