Molar Mass
What is the molar mass of H2O?
18.02 g/mol
How many atoms of gold are in one mole?
6.02 x 1023 atoms = Avogadro's number
Balance:
___ HCl → ___ H2 + ___ Cl2
2 HCl → H2 + Cl2
What are the reactants in the equation:
2 NaCl + F2 → 2 NaF + Cl2
NaCl and F2
What symbol is written between the reactants and the products in a chemical equation?
An arrow
What is the molar mass of CO2?
44.01 g/mol
If you have 42 grams of water, how many moles of H2O do you have?
2.3 moles water
Balance:
___ H2 + ___ O2 → ___ H2O
2 H2 + O2 → 2 H2O
What are the products in the equation:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
CO2 and H2O
What is the formula of diphosphorus pentoxide?
P2O5
What is the molar mass of ZnSO4?
161.44 g/mol
If you have 2.5 moles of hydrogen gas, how many grams of H2 do you have?
5.1 grams hydrogen gas
Balance:
___ NaCl + ___ F2 → ___ NaF + ___ Cl2
2 NaCl + F2 → 2 NaF + Cl2
What type of reaction is:
4 Fe + 3 O2 → 2 Fe2O3
What is Avogadro's number?
6.02 x 1023 = 1 mole
What is the molar mass of Mg(OH)2?
58.33 g/mol
If you have 5.2 moles of methane, how many molecules of CH4 do you have?
3.13 x 1024 molecules
Balance:
___ Fe + ___ O2 → ___ Fe2O3
4 Fe + 3 O2 → 2 Fe2O3
What type of reaction is:
2 HCl → H2 + Cl2
Decomposition
What is the name of the following compound?
MgCl2
magnesium chloride
What is the molar mass of Ca3(PO4)2?
310.18 g/mol
If you have 8.56 x 1023 atoms of copper, how many moles do you have?
1.42 moles of copper
Balance:
___ C3H8 + ___ O2 → ___ CO2 + ___ H2O
C3H8 + 5 O2 → 3 CO2 + 4 H2O
Predict the products of the following reaction:
MgBr2 + F2 →
MgF2 + Br2
Write the following as a chemical equation:
You react calcium bromide with fluorine gas to produce bromine and calcium fluoride.
CaBr2 + F2 --> Br2 + CaF2