Vocab + Concepts
This SI unit is used in chemistry to count the amount of a substance.
a mole
The number of moles contained in 12.01 g of Carbon.
1.00 mol C
On the mole conversion chart, this central unit MUST be reached first when converting from grams to liters of gas.
moles
Using the equation 2H2 + O2 --> 2H2O
What is the mole ratio of H2 to H2O?
2:2 (or 1:1 to be simplified)
Balance this equation:
___ H2 + ___ O2 --> ___ H2O
*100 bonus points if you can say what kind of reaction it is*
2 H2 + O2 --> 2 H2O
Synthesis
The specific numerical value and unit of Avogadro’s number
6.022 x 1023 part/mol
The number of molecules contained in 1.00 mole of water.
6.02 x 1023 molecules H2O
The number of molecules in 11.2 L of methane gas (CH4) at STP.
3.01 x 1023 molecules CH4
What is the number of moles of NH3 produced from 6.0 moles of H2?
4.0 moles NH3
Balance this equation:
___ Na + ___ Cl2 --> ___ NaCl
*100 bonus points if you can say what kind of reaction it is*
2 Na + ___ Cl2 --> 2 NaCl
Synthesis
According to Avogadro’s Law, 1 mole of any gas at STP occupies this exact volume.
22.4 L
The molar mass of Calcium Carbonate (CaCO3)
100.09 g/mol CaCO3
The volume in liters occupied by 64.0 g of oxygen gas (O2) at STP.
44.8 L O2
Given 2H2 + O2 --> 2H2O
What is the mass in grams of H2O produced when 4.00 moles of H2 reacts completely?
72.08 g H2O
Balance this equation:
___ Mg + ___ HCl --> ___ MgCl2 + ___ H2
*100 bonus points if you can say what kind of reaction it is*
Mg + 2 HCl --> MgCl2 + H2
Single Replacement
What is STP? What does it mean?
Standard Temperature and Pressure
The volume in liters occupied by 0.500 mol of helium gas at STP
11.2 L He2
The mass in grams of 1.204 x 1024 molecules of carbon dioxide (CO2)
88.02 g CO2
Given CH4 + 2O2 --> CO2 + 2H2O
What are the moles of O2 needed to react completely with 32.08 g of CH4?
4.00 moles O2
Balance this equation:
___ CH4 + ___ O2 --> ___ CO2 + ___ H2O
*100 bonus points if you can say what kind of reaction it is*
CH4 + 2 O2 --> CO2 + H2O
Combustion
In a balanced chemical equation, these numbers represent the relative number of moles or molecules of each substance.
coefficient
The mass in grams of 4.00 moles of sodium hydroxide (NaOH)
160.00 grams NaOH
The total number of individual oxygen atoms present in 90.0 g of water
3.01 x 1024 atoms O2
Given 2NaCl --> 2Na + Cl2
What is the mass in grams of NaCl required to yield 355g of Cl2 gas?
585 g NaCl
Balance this equation:
___ Al(OH)3 + ___ H2SO4 --> ___ Al2(SO4)3 + ___ H2O
*100 bonus points if you can say what kind of reaction it is*
2 Al(OH)3 + 3 H2SO4 --> Al2(SO4)3 + 6 H2O
Double Displacement