JAMB - Chemistry (1980 - No. 5)
A sample of an oxide of mercury weighed 1.00g. When this was heated, oxygen was given off, and 1.00g of mercury metal only was left. What is the formula of the oxide?
Hg2O
HgO2
HgO2
HgO
None of the above
Paskaidrojums
Various oxides of mercury: Mercury(I) oxide (mercurous oxide), Hg\(_2\)O. Mercury(II) oxide (mercuric oxide), HgO.
No specific oxide of mercury is refered in the question.