Question

what mass of product is formed during the reaction in the graphic below?
hydrogen + bromine → hydrogen bromide
16.225 g ? g
give your answer to the correct number of significant figures.

Explanation:

Step1: Balance the chemical equation

The balanced reaction is:

$$\text{H}_2 + \text{Br}_2 ightarrow 2\text{HBr}$$

Step2: Identify reactant mass

The mass of the reactants (hydrogen + bromine) is $16.225\ \text{g}$.

Step3: Apply Law of Conservation of Mass

Mass of products = Mass of reactants.
$$\text{Mass of HBr} = 16.225\ \text{g}$$

Step4: Round to correct sig figs

The given mass has 5 significant figures, so the product mass retains 5 sig figs.

Answer:

$16.225\ \text{g}$