Question 1:

What is the definition of stoichiometry?

Explanation: The correct answer is B) The relationship between reactants and products in a chemical reaction. Stoichiometry is a branch of chemistry that deals with the quantitative relationships between the amounts of reactants and products in a chemical reaction. It is based on the balanced chemical equation and helps determine the ratios of substances involved.

Question 2:

What is the purpose of stoichiometric coefficients in a balanced chemical equation?

Explanation: The correct answer is C) To establish the mole ratios between reactants and products. Stoichiometric coefficients in a balanced chemical equation represent the relative number of moles of each substance involved in the reaction. They help establish the mole ratios between reactants and products, which are essential for determining the quantities of substances involved in a reaction.

Question 3:

Which of the following statements is true about reaction stoichiometry?

Explanation: The correct answer is C) It helps calculate the theoretical yield of products. Reaction stoichiometry provides the quantitative relationship between reactants and products in a chemical reaction. It allows for the calculation of the amount of product that should be obtained based on the given amounts of reactants, known as the theoretical yield. It does not predict the direction or speed of a reaction.

Question 4:

Which of the following is a step involved in solving stoichiometry problems?

Explanation: The correct answer is D) All of the above. Solving stoichiometry problems typically involves several steps. First, the chemical equation needs to be balanced to ensure that the reactants and products are in the correct ratios. Then, the limiting reactant is determined, which helps identify the reactant that limits the amount of product that can be formed. Finally, the given quantities are converted to moles for calculations involving stoichiometric ratios.

Question 5:

Which of the following is an application of reaction stoichiometry?

Explanation: The correct answer is D) Calculating the mass of reactants and products. Reaction stoichiometry allows for the calculation of the mass of reactants consumed and the mass of products formed in a chemical reaction. It involves the use of mole ratios and molar masses to convert between moles and mass. Determining the rate, predicting products, and calculating concentrations involve other concepts and calculations.