Stoichiometry

Balancing Equations

100

Fe(OH)₃ -> Fe₂O₃ + H₂O

2Fe(OH)₃ -> Fe₂O₃ + 3H₂O

200

Si + S₈ -> Si₂S₄

4Si + S₈ -> 2Si₂S₄

300

Cu +CO₂ + O₂ + H₂O -> CuCO₃ + Cu(OH)₂

2Cu +CO₂ + O₂ + H₂O -> CuCO₃ + Cu(OH)₂

400

Al + FeO -> Al₂O₃ + Fe

2Al + 3FeO -> Al₂O₃ + 3Fe

500

C₇H₆O₂ + O₂ -> CO₂ +H₂O

2C₇H₆O₂ + 15O₂ -> 14CO₂ +6H₂O

Types of Chemical Rxn

100

2Na + S -> Na₂S

Synthesis 

200

NaCl +AgNO₃ -> AgCl + NaNO₃

Double Replacement

300

2Pb(NO₃)₂ -> 2Pb + 4NO₃

Decomposition

400

CH₄ + 2O₂ -> CO₂ + 2H₂O

Combustion!

500

BaCl₂ + Na₂SO₄ -> BaSO₄ + 2NaCl

Double Replacement 

Mole-Mole Stoichiometry

100

2Buns + 1Burger + 1Cheese + 3Veggies -> 1Cheeseburger

How many cheeseburgers can you make with 16 veggies?

5 cheeseburgers!

200

2H₂ + O₂ -> 2H₂O

How many moles of O₂ are needed to react fully with .5 moles of H₂?

.25 moles of O₂

300

2S + 3O₂ -> 2SO₃

If you have 1.75 moles of SO_3, how many moles of O₂ was consumed?

2.625 moles of O₂

400

Fe₂O₃ + 3H₂ -> 2Fe + 3H₂0

If you react 25 moles of Fe₂O₃ with excess H₂, how many moles of iron are produced?

50 moles of Fe

500

3Cu + 8HNO₃ -> 3Cu(NO₃)₂ + 2NO + H₂O

How many moles of HNO₃ are needed to react with 2.56 moles of copper?

6.827 moles of Cu

Masses,Moles,& Form Units

100

The number of atoms in 2.00 moles of Li?

What is 1.20 x 10²⁴ atoms Li?

200

The number of moles you have given 25 g of NaCl

What is 0.43 mol NaCl?

300

The number of atoms in 55 grams of iron

What are 5.9 x 10²³ atoms Fe?

400

The mass of 3.13 x 10²¹ atoms of KBr

What is .619 grams?

500

Oxygen atoms in 4.90 mol in Al₂O₃

8.85 x 10²⁴ O atoms

Percent Composition

100

The percent composition of Na in NaCl

What is 39.7%?

200

The percent composition of Cl in NaCl

What is 60.3%?

300

The percent of oxygen in water

What is 88.9%?

400

Percent of hydrogen in water

What is 11.1%?

500

The percent of oxygen in calcium nitrate

What is 58.5%?