Moddalarning molyar massasini topish

A)21,74 B)13,04 C)52,17 D)40
31. CrO₃ ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)52B)48 C)25 D)75
32. Na₂Oushbu modda tarkibidagi natriy elementining massa ulushini(%) toping.
A)74,19B)25,81 C)16 D)46
33. KO₃ushbu modda tarkibidagi kaliy elementining massa ulushini(%) toping.
A)44,83 B)55,17 C)39 D)25
34. KO₂ ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)55B)45C)40 D)60
35. BaO₂ushbu modda tarkibidagi bariy elementining massa ulushini(%) toping.
A)81,07B)18,93C)83 D)17
36. Al₂O₃ ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)52,94 B)47,06 C)40 D)60
37. Al₂O₆ushbu modda tarkibidagi alyuminiy elementining massa ulushini(%) toping.
A)42,94B)57,06C)36D)64
38. Karo kislota (H₂SO₅) tarkibidagi oltingugurt elementining massa ulushini(%) toping.
A)1,75 B)28,07C)70,18D)64
39.Tetrationat kislota(H₂S₄O₆) tarkibidagi kislorod elementining massa ulushini(%) toping.
A)0,885B)56,637C)42,478 D)96
40.Natriy pentationat(Na₂S₅O₆) tarkibidagi natriy elementining massa ulushini(%) toping.
A)42,478B)15,23C)52,98 D)31,79
41. Na₂S₂O₈ ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)15,23B)19,33C)53,78 D)26,89
42. Kaliy gipofosfit(KH₂PO₂) tarkibidagi kaliy elementining massa ulushini(%) toping.
A)37,5B)29,8C)1,9D)30,8
43. Cl₂O₆ushbu modda tarkibidagi xlor elementining massa ulushini(%) toping.
A)42,5B)52,6 C)57,5D)47,4
44. Cl₂O₄ ushbu modda tarkibidagi kislorod elementining massa ulushini toping.
A)0,425 B)0,526 C)0,575 D)0,474
45. N₂O₄ushbu modda tarkibidagi azot elementining massa ulushini(%) toping.
A)69,57B)30,43 C)28D)64
46. H₂O₂ ushbu modda tarkibidagi kislorod elementining massa ulushini(%) toping.
A)5,88B)2C)32D)94,12
47. C₂H₂ushbu modda tarkibidagi vodorod elementining massa ulushini(%) toping.
A)92,3 B)7,7C)2D)24
48. Na₂SiO₃ushbu modda tarkibidagi kremniy elementining massa ulushini(%) toping.
A)37,7 B)22,95 C)39,35 D)28
49. H₄SiO₄ushbu modda tarkibidagi vodorod elementining massa ulushini(%) toping.