Balancing Equations
Fe(OH)3 -> Fe2O3 + H2O
2Fe(OH)3 -> Fe2O3 + 3H2O
2Na + S -> Na2S
Synthesis
2Buns + 1Burger + 1Cheese + 3Veggies -> 1Cheeseburger
How many cheeseburgers can you make with 16 veggies?
5 cheeseburgers!
The number of atoms in 2.00 moles of Li?
What is 1.20 x 1024 atoms Li?
The percent composition of Na in NaCl
What is 39.7%?
Si + S8 -> Si2S4
4Si + S8 -> 2Si2S4
NaCl +AgNO3 -> AgCl + NaNO3
Double Replacement
2H2 + O2 -> 2H2O
How many moles of O2 are needed to react fully with .5 moles of H2?
.25 moles of O2
The number of moles you have given 25 g of NaCl
What is 0.43 mol NaCl?
The percent composition of Cl in NaCl
What is 60.3%?
Cu +CO2 + O2 + H2O -> CuCO3 + Cu(OH)2
2Cu +CO2 + O2 + H2O -> CuCO3 + Cu(OH)2
2Pb(NO3)2 -> 2Pb + 4NO3
Decomposition
2S + 3O2 -> 2SO3
If you have 1.75 moles of SO3, how many moles of O2 was consumed?
2.625 moles of O2
The number of atoms in 55 grams of iron
What are 5.9 x 1023 atoms Fe?
The percent of oxygen in water
What is 88.9%?
Al + FeO -> Al2O3 + Fe
2Al + 3FeO -> Al2O3 + 3Fe
CH4 + 2O2 -> CO2 + 2H2O
Combustion!
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
The mass of 3.13 x 1021 atoms of KBr
What is .619 grams?
Percent of hydrogen in water
What is 11.1%?
C7H6O2 + O2 -> CO2 +H2O
2C7H6O2 + 15O2 -> 14CO2 +6H2O
BaCl2 + Na2SO4 -> BaSO4 + 2NaCl
Double Replacement
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
Oxygen atoms in 4.90 mol in Al2O3
8.85 x 1024 O atoms
The percent of oxygen in calcium nitrate
What is 58.5%?