Stoichiometry

Balancing Equations

100

Fe(OH)₃ ---> Fe₂O₃ + H₂O

2Fe(OH)₃ ---> Fe₂O₃ + 3H₂O

200

Si + S₈ ---> Si₂S₄

4Si + S₈ ---> 2Si₂S₄

400

Al + FeO ---> Al₂O₃ + Fe

2Al + 3FeO ---> Al₂O₃ + 3Fe

500

C₇H₆O₂ + O₂ ---> CO₂ +H₂O

2C₇H₆O₂ + 15 O₂ ---> 14CO₂ +6H₂O

Types of Chemical Rxn

100

2Na + S ---> Na₂S

What is Synthesis?

200

NaCl +AgNO₃ ---> AgCl + NaNO₃

What is Double Replacement?

300

2Pb(NO₃)₂ ---> 2Pb + 4NO₃

What is Decomposition?

400

CH₄ + 2O₂ ---> CO₂ + 2H₂O

What is Combustion?

500

BaCl₂ + Na₂SO₄ ---> BaSO₄ + 2NaCl

What is Double Replacement? 

Mole-Mole Stoichiometry

100

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

If you have 16 veggies, you can make this many cheeseburgers.

What is 5 cheeseburgers?

200

2H₂ + O₂ ---> 2H₂O

This many moles of O₂ are needed to react fully with .5 moles of H_2.

What is .25 moles of O_2?

300

2S + 3O₂ -> 2SO₃

If you have 1.75 moles of SO_3, you will consume this many moles of O_2. 

What is 2.63 moles of O_2?

400

Fe₂O₃ + 3H₂ ---> 2Fe + 3H₂0

25 moles of Fe₂O₃ with excess H₂, will make this many moles of iron.

What is 50 moles of Fe?

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 of 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%?