Question

What is the formula for mercury oxide?
A.$HgO$
B.$H{g}_2{O}_3$
C.$H{g}_{2}O$
D.$Hg{O}_2$

Answer 1

Hint- We will mention all we know about the given element in the question i.e. mercury oxide. Its molar mass, density and its formula in the solution given below.

Complete answer:

Mercury(II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of HgO. It has a red or orange color. Mercury(II) oxide is a solid at room temperature and pressure. The mineral form montroydite is very rarely found.
Molar mass: 216.59 g/mol
Formula: HgO
Melting point: 500 °C
Density: 11.14 g/cm³
Thus, option A is correct.

Note: Whenever asked such a question, always bend towards writing all the information you have about the subject then write what was asked by the question as done above. The element in the above question was mercury oxide.