Answer:
to emphasize the word for shoppers
Explanation:
The expected age for one of the passengers on the train is 7.
<em>A ) 7 GRAMS</em>
7 grams.
The sum of the reactants must equal the sum of the products.
Reactant = 100 grams
Products = 100 g mercuric oxide - 93 g mercury which equals 7 grams oxygen.