100g of mercuric oxide is heated and decomposed to produce 7.4g of oxygen. What mass of mercury must be produced in the reaction?

Explanation

To solve the problem of determining the mass of mercury produced when 100g of mercuric oxide is heated and decomposed to produce 7.4g of oxygen, we can follow these steps:

### Step 1: Write the Chemical Equation
The decomposition of mercuric oxide (HgO) can be represented by the following chemical equation:
\[ 2 \text{HgO} \rightarrow 2 \text{Hg} + \text{O}_2 \]

### Step 2: Identify the Mass of Reactants and Products
We know:
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