Stoichiometry
Composition Stoichiometry
Mighty Moles
Magical Mole to Mole
Problems
100

What does a coefficient mean in stoichiometry?

The amount of moles in a balanced equation.

100

What is the mole ratio of carbon  to hydrogen in C2H6?

What is 2:6.

100

What is necessary to convert moles of one element to moles of another element?

mole ratio

100

What is the mole ratio of Fe and O in the compound Fe3O4?

3 mols Fe: 4 mols O.

100

If you have 4 moles of Fe, how many atoms of Fe do you have?

2.409 x 1024 atoms

200

What is stoichiometry about?

The study of quantitative relationships between reactants and products in a chemical reaction.  Chemistry math.

200

Reactant that is not used up when a reaction is run to completion

excess reactant

200

What is the constant for the amount of a mole in molecules, atoms, and particles is?

Avogadro's number.

200

What is the mole ratio of hydrogen gas to water in the following equation?

H2 + O2 --> 2H2O

1 mol : 2 mol

200

How many moles are present in 5.67 x 1025 of atoms of carbon?

94.2 moles

300

How many steps in a mass to mass stoichiometry conversion?

3 steps.

300

You are asked to find the mass of a compound.  Where should you look?

Periodic table

300

What are the units for molar mass?

grams/mole

300

What is the molar mass for CaOH?

57 grams

300

How many moles of Al2O3 is produced if you have 2 moles of Al?

4 Al + 3 O2 --> 2 Al2O3

1 mol of Al2O3

400

What are the two parts that you look for in a stoichiometry problem?

The given and the unknown.

400

What is the first step you should do in stoichiometry?

Balance the equation
400

What is the number of moles of carbon in the compound C6H12O6?

6 moles

400

What would be the molar mass for the compound NaOH?

40 grams

400

 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

500

If I need to go to liters, what is the constant for liters/mol?

22.4 L

500

If you have 5 L of H2O, how many moles do you have?

0.223 mol of H2O

500

Given the compound 4NH3, how many moles of hydrogen would this compound contain?

12 moles.

500

If you are given 4.0x104mols of NaOH, how many moles of (OH) hydroxide are present?

What is 4.0x104mols of OH.

500

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

M
e
n
u