Reactants & Products
What are the molecules that go into a chemical reaction and undergo change?
reactants
What does the coefficient in a chemical formula tell you?
How many molecules there are
What is molar mass?
the mass of a substance in 1 mole
Stoichiometry is greek for...
"measuring elements"
What are the molecules that are created as a result of a chemical reaction.
products
What does the subscript in a chemical formula tell you?
How many atoms of a specific element there are?
Where can you find the molar mass of an individual atom?
Periodic Table of Elements
How many particles are in 1 mole?
(Hint: Avogadro's number)
6.02 x 1023 particles
C7H16 + 11 O2 → 7 CO2 + 8 H2O
What are the reactants in the equation above?
C7H16 + 11 O2
7 CO2
How many CO2 molecules are shown above?
7
What is the molar mass of gold (Au)?
196.97 g
What ratio is needed to convert from liters to moles?
1 mole / 22.4 L
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
Is carbon dioxide (CO2) a product or reactant in the equation above?
product
7 CO2
How many oxygen atoms are shown above?
14
What is the molar mass of aluminium (Al)?
26.982 g
What ratio is needed to convert from grams to moles?
1 mole / molar mass (g)
2 H₂O₂ → 2 H₂O + O₂
How many moles of water are produced by the equation above?
2 moles of water
Balance the following equation
Zn + HCl → ZnCl2 + H2
Zn + 2 HCl → ZnCl2 + H2
What is the molar mass of methane (CH4)?
16.043 g
2 H₂O₂ → 2 H₂O + O₂
How many grams of O2 are created by the chemical reaction above?
31.998 g O2