Formulas

Question 1

How to calculate molar mass, aka molecular mass or atomic mass.

Answer 1

Question 2

How to convert from grams to moles?

Answer 2

Question 3

How to convert grams to molecules?

Answer 3

Question 4

Conversion Shortcuts:

1. Moles to Atoms / molecules
2. Atoms / molecules to moles
3. Moles to grams
4. Grams to Moles

Answer 4

Question 5

How to calculate empirical formula

Answer 5

Question 6

How to balance a chemical equation

Answer 6

Question 7

How to give IUPAC name for a compound

Answer 7

First, determine if the compound is:

1. Ionic = Metal + Nonmetal (cation and anion). Always balance out charges.
2. Molecular = Multiple non metals = use prefixes and suffixes.

Question 8

How to calculate volume

Answer 8

General formula:

Density = mass/volume

Rearranged: Volume = mass/density

Question 9

How to convert mass to moles

Answer 9

Just divide by atomic weight!

Question 10

How to find limiting reagent

Answer 10

Question 11

How to calculate molarity

Answer 11

Question 12

Stoichiometry Template

Answer 12

Question 13

Stoichiometry Made Easy - Cheat to Find How many grams of x will be produced x? In this example, how many grams of ammonia will be produced?

Answer 13

1. Always start by balancing equation
2. Now, put an x in front of every compound
3. Place molecular weight of each compound in front of each x.
4. Solve for x.

Question 14

How to approach Stoichimoetric Calculations - from TRU

Answer 14