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Chemistry Questions And Answers.

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Exercise :: Chemistry
1.The mass of one mole of electrons is.
A. 1.008 mg
B. 0.55 mg
C. 0.184 mg
D. 1.673 mg
2.One mole of SO2 contains
A. 6.02 x 1023atoms of oxygen
B. 18.1 x 1023atoms of SO2
C. 6.02 x 1023atoms of Sulphur
D. 4 g atoms of SO2
3.During combustion analysis, CO2 produced is absorbed in
A. Mg (CLO4)2
B. 50% KOH
C. CaCl2
D. P2O5
4.Calcium has isotopes
A. 7
B. 9
C. 1
D. 6
5.CO+ is an example of.
A. Free radical
B. Cationic molecular ion
C. Anionic molecular ion
D. Stable molecule