Chemical Reactions Assessment

A chemical reaction is best defined as...

• A chemical reaction is typically represented by a chemical equation, which represents the change from reactants to products.

• A chemical reaction is typically represented by a chemical equation, which represents the change from products to reactants.

• A chemical reaction is typically represented by a chemical equation, which goes from start to finish.

• A chemical reaction is when two different substances collide.

4.00 g of hydrogen gas mixed with 20.0g of oxygen gas. 1.98 moles of H2 is able to be formed and 0.99 moles of O2 are able to be formed. Which is the limiting reagent?

• H2 is the limiting reagent

• O2 is the limiting reagent

• Both are limiting reagents

• Neither H2 nor O2 are limiting reagents

The image shows the equation of...

• Molarity

• Molality

• The percent formed

• The amount of reactant needed

Define the type of reaction that occurs when aqueous solutions of anions and cations combine to form a compound that is insoluble is known as precipitation.

• Combustion

• Decomposition

• Double-replacement

• Single-replacement

Define the type of reaction that occurs when the oxidation number of atoms involved in the reaction are changed.

• Decomposition

• Redox reaction

• Single-replacement

• Double-replacement

The following reaction is an example of what type of chemical reaction?

C6H12O6(s)+6O2(g)→6CO2(g)+6H2O(g)

• Combustion

• Synthesis

• Decomposition

• Redox reaction

The image depicts a simplified version of what type of reaction

• Combustion

• Double-replacement

• Redox reaction

• Synthesis

A decomposition reaction is the opposite of a synthesis reaction. During a decomposition reaction, a more complex compound breaks down into multiple simpler compounds.

Which of the following reactions represents this type of decomposition reaction?

• H2O2(l)→H2(g)+O2(g)

• H2(g)+O2(g)→H2O2(l)

• H2SO4(l)+H(+)→H3SO4(l)

• C6H12O6(s)+6O2(g)→6CO2(g)+6H2O(g)

Define the type of oxidation-reduction reaction in which an element in a compound is replaced by another element.

• Double-replacement

• Single-replacement

• Combustion

• Decomposition

C3H6O3 + O2 → CO2 (g) +H2O (g)

What type of reaction is shown in the reaction given?

• Decomposition

• Combustion

• Single-replacement

• No reaction occurs