How many moles of oxygen are produced from decomposition of 100.0 g of mercury(ll) oxide

0.231 mol

Explanation:

Given data:

Moles of oxygen produced= ?

Mass of mercury(II) oxide = 100 g

Solution:

Chemical equation:

2HgO → 2Hg + O₂

Number of moles of mercury oxide:

Number of moles = mass/ molar mass

Number of moles = 100 g/ 216.6 g/mol

Number of moles = 0.462 mol

Now we will compare the moles of oxygen with mercury oxide.

     HgO         :          O₂

       2             :           1

       0.462     :         1/2× 0.462 = 0.231 mol