Chapter 9.1 Stoichiometry

The coefficients in a chemical equation represent the

• masses in grams of all reactants and products.

• relative number of moles of reactants and products.

• number of atoms of each element in each compound in a reaction.

• number of valence electrons involved in a reaction.

Which of the following would not be studied within the topic of stoichiometry?

• the mole ratio of Al to Cl in the compound aluminum chloride

• the mass of carbon produced when a known mass of sucrose decomposes

• the number of moles of hydrogen that will react with a known quantity of oxygen

• the amount of energy required to break the ionic bonds in CaF₂

A balanced chemical equation allows you to determine the

• mole ratio of any two substances in the reaction.

• energy released in the reaction.

• electron configuration of all elements in the reaction.

• reaction mechanism involved in the reaction.

The relative number of moles of hydrogen to moles of oxygen that react to form water represents a(n)

• reaction sequence.

• bond energy.

• mole ratio.

• element proportion.

Given the reaction represented by the following unbalanced equation:

N₂O + O₂ -> NO₂

List in order the coefficients that balance the equation. (Separate coefficients by a comma.) **Save this equation for 4 other related questions.

Given the reaction represented by the following unbalanced equation:

N₂O + O₂ -> NO₂

What is the mole ratio of NO₂ to O₂? **

Balance and save this equation for 4 other related questions.

___ mol NO₂:___ mol O₂

_{Only include numbers in the final answer.}

Given the reaction represented by the following unbalanced equation:

N₂O + O₂ -> NO₂

**Balance the equation and save for 4 other related questions.

Twice as many moles of NO₂ form as moles of N₂O are consumed. True or False?

N₂O + O₂ -> NO₂

• True

• False

Given the reaction represented by the following unbalanced equation:

N₂O + O₂ -> NO₂

**Balance and save this equation for 4 other related questions.

Twice as many grams of NO₂ form as grams of N₂O are consumed. True or False?

N₂O + O₂ -> NO₂

• True

• False

Determine the molar mass of ammonia and express in grams per mole. Round the answer to two decimal places. Only record the number for the answer.

N₂ + 3H₂ -> 2NH₃

Which of the following is not a correct mole ratio for the following equation?

N₂ + 3H₂ -> 2NH₃

• 3 mol H₂:1 mol N₂

• 2 mol NH₃:3 mol H₂

• 2 mol NH₃:0 mol N₂

• 1 mol N₂:3 mol H₂