Answer:

Explanation:
First we have to start with the reaction:

The next step is to <u>balance the reaction</u>, we can start with Oxygen, so:

Then we can continue with <u>Ca</u>:

Then we can balance <u>S</u>:

And finally with <u>Hg</u>:

With the balance reaction we know that the molar ratio between Hg nd CaO is 4:4. Therefore, the nex step is the conversion of 31.28 g Hg to moles of Hg using the <u>atomic mass</u> of Hg (200.59 g/mol).


The next step, using the molar ratio (4:4) and the <u>molar mas</u>s of CaO (56.1 g/mol) we can calculate the <u>grams of CaO</u> that we need:

