Moddalarning molyar massasini topish

D) Na=36,5 H=0,79 P=24,6 O=38,1
18. (NH₄)H₃P₂O₇ ushbu modda tarkibidagi barcha elementlarning massa ulushini(%) toping.
A)N=5,18 H=5,59 P=31,8 O=57,4
B) N=6,18 H=4,59 P=29,8 O=59,4
C) N=4,18 H=6,59 P=30,8 O=58,4
D) N=7,18 H=3,59 P=31,8 O=57,4
20. Ca₃N₂ ushbu modda tarkibidagi barcha elementlarning massa ulushini(%) toping.
A)Ca=40 N=60 B) Ca=81,08 N=18,92
C)N=81,08 Ca=18,92 D)Ca=60 N=40
21. C₄H₅N ushbu modda tarkibidagi barcha elementlarning massa ulushini(%) toping.
A)C=70,64 H=8,46 N=20,9
B) C=73,64 H=5,46 N=20,9
C) C=72,64 H=5,46 N=21,9
D) C=71,64 H=7,46 N=20,9
22. Al(OH)₂Cl ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)28B)2,07 C)33,16D)36,8
23. Na₂S₂O₃ushbu modda tarkibidagi natriy elementining massa ulushini(%) toping.
A)29,11B)46 C) 33,16 D)31,8
24. NaBrO₃ ushbu modda tarkibidagi natriy elementining massa ulushini(%) toping.
A)28 B)15,23C)45,83 D)31,8
25. HMnO₄ushbu modda tarkibidagi marganes elementining massa ulushini(%) toping.
A)0,833 B)45,83C)53,3 D)55
26. H₂MnO₄ ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)1,65 B)45,45 C)52,9 D)64
27. NaOH ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)57,5 B)40 C)2,5 D)16
28. Na[Cr(OH)₄]ushbu modda tarkibidagi xrom elementining massa ulushini(%) toping.
A)16,08 B)36,36 C)2,8 D)44,75
29. Cr(OH)₃ ushbu modda tarkibidagi vodorod elementining massa ulushini(%) toping.
A)50,5 B)48C)2,91 D)46,6
30. Dolomit (CaCO_{3 *} MgCO₃)tarkibidagi kalsiy elementining massa ulushini(%) toping.