Question

1. choose the best answer.

according to le chatelier’s principle, what will happen to the system when more reactants are added to a system?
the reaction will shift toward the products.
the reaction will shift toward the reactants.
the reaction will stop.
nothing will happen to the reaction.

1. choose the best answer.

students observe the combustion reaction taking place when they light a propane grill.
which best describes the reactants of the reaction?
carbon dioxide and water
oxygen and water
propane and water
propane and oxygen

Explanation:

Question 9

Le Chatelier’s principle states that if a stress (like adding reactants) is applied to a system at equilibrium, the system will shift to counteract the stress. Adding more reactants increases their concentration, so the reaction shifts toward products to reduce the reactant concentration.

Combustion reactions involve a fuel (propane, $\ce{C3H8}$) reacting with oxygen ($\ce{O2}$) to produce carbon dioxide and water. Reactants are the substances that react, so propane and oxygen are the reactants here. The other options include products (carbon dioxide, water) or incorrect combinations.

Answer:

The reaction will shift toward the products.

Question 10