Chemistry Questions And Answers.

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