What does a coefficient mean in stoichiometry?
The amount of moles in a balanced equation.
What is the mole ratio of carbon to hydrogen in C2H6?
What is 2:6.
What is necessary to convert moles of one element to moles of another element?
mole ratio
What is the mole ratio of Fe and O in the compound Fe3O4?
3 mols Fe: 4 mols O.
If you have 4 moles of Fe, how many atoms of Fe do you have?
2.409 x 1024 atoms
What is stoichiometry about?
The study of quantitative relationships between reactants and products in a chemical reaction. Chemistry math.
Reactant that is not used up when a reaction is run to completion
excess reactant
What is the constant for the amount of a mole in molecules, atoms, and particles is?
Avogadro's number.
What is the mole ratio of hydrogen gas to water in the following equation?
H2 + O2 --> 2H2O
1 mol : 2 mol
How many moles are present in 5.67 x 1025 of atoms of carbon?
94.2 moles
How many steps in a mass to mass stoichiometry conversion?
3 steps.
You are asked to find the mass of a compound. Where should you look?
Periodic table
What are the units for molar mass?
grams/mole
What is the molar mass for CaOH?
57 grams
How many moles of Al2O3 is produced if you have 2 moles of Al?
4 Al + 3 O2 --> 2 Al2O3
1 mol of Al2O3
What are the two parts that you look for in a stoichiometry problem?
The given and the unknown.
What is the first step you should do in stoichiometry?
What is the number of moles of carbon in the compound C6H12O6?
6 moles
What would be the molar mass for the compound NaOH?
40 grams
C3H8 + 5 O2 -->3 CO2 + 4 H2O
If 4.5 moles of C3H8 combusts, how many moles of CO2 will be produced?
13.5 mols of CO2
If I need to go to liters, what is the constant for liters/mol?
22.4 L
If you have 5 L of H2O, how many moles do you have?
0.223 mol of H2O
Given the compound 4NH3, how many moles of hydrogen would this compound contain?
12 moles.
If you are given 4.0x104mols of NaOH, how many moles of (OH) hydroxide are present?
What is 4.0x104mols of OH.
Fe2O3 + C → Fe + CO2
If you start with 2.5 grams of carbon, how many grams of iron will be produced?
*HINT - make sure your equation is balanced.
15.523 g of Fe