Stoichiometry

DEFINITIONS

100

Mass relationships between substances in a chemical reaction.

Stoichiometry

200

Indicated by coefficients in a balanced equation

Mole ratio

300

Reactant that is not used up when a reaction is completed

Excess Reactant

400

Reactant that is used up completely in a chemical reaction

Limiting Reactant

500

a process that involves rearrangement of the molecular or ionic structure of a substance

Chemical Reaction

STEPS

100

What is the first step you take in a mass to mass relationship problem

Balance the equation

200

What is the second step you take in a mass to mass relationship problem

Convert the given mass to moles

300

What is the third step you take in a mass to mass relationship problem

Use mole ratio to convert to new substance

400

What is the fourth step you take in a mass to mass relationship problem

Convert new moles to given mass

500

What is something you could use to help with the problem solving

Mole City

CONVERSIONS

100

 What are you trying to find when you convert moles to moles? 

Mole Ratio

200

What are you trying to find when you convert moles to grams?

Molar Mass, Formula Mass, PT Mass

300

What is the conversion you use convert mass to moles

1 mol / Molar Mass (Formula Mass, PT Mass)

400

What is the conversion you use convert mole to volume

22.4 L / 1 mol

500

What is the conversion you use convert molecules to moles

1 mol / 6.02 x 10²³

RANDOM QUESTIONS

100

T/F: You can find the volume of a new substance in a chemical reaction

True

200

What is the formula for mole ratio

moles of old / moles of new

300

4Fe + 3O₂---> 2Fe₂O₃ Find the mole ratio of Iron to Oxygen

4/3

400

What is the volume of a gas at STP?

22.4 L

500

What is the molar mass of camel fat. (HINT: the formula for camel fat is C₅₇H₁₁₀O₆)

891.48 g/mol

PROBLEMS

100

Fe₃O₄ + 4CO---> 3Fe + 4CO₂ How many moles of CO are needed to react with 16.5 g of Fe₃O₄

0.285 mol CO

200

How many moles of Fe2O3 will form from 5.0 moles of Fe?

4Fe + 3O₂---> 2Fe₂O₃

2.5 mol Fe₂O₃

300

How many moles of KClO3 must decompose in order to produce 9 moles of oxygen gas? 

2KClO3 --> 2KCl + 3O₂

6 mol KClO₃

400

How many grams of NH₃ will be produced from 28 g N₂?

N2 + 3H₂ --> 2NH₃

34 grams NH₃

500

What volume of Hydrogen at STP is produced from 75 g of HCl?

Mg + 2HCl --> MgCl₂ + H₂

23 L H₂