Chemistry Study Guide – Stoichiometry
Name ___________________________
Date ______________
Period _________
1 mole is defined as ___________________ particles, also known as Avogadro’s number.
Molar Mass – Calculate for the molar mass of each compound
a.
b.
c.
d.
e.
H3PO4
Na2S
C4H10
KOH
Fe2O3
f.
g.
h.
i.
j.
P4O10
SI6
C6H13OH
NH4NO3
Al(CN)3
Balancing Equations – Balance each of the following equations
a.
b.
c.
d.
e.
f.
g.
h.
___ Na + ___ O2 → ___ Na2O
___ Hg + ___ O2 → ___ HgO
___ Ag + ___ O2 → ___ Ag2O
___ Cu + ___ O2 → ___ CuO
___ NH4NO3 → ___ N2 + ___ O2 + ___ H2O
___ KOH + ___ H3PO4 → ___ K3PO4 + ___ H2O
___ P4O10 + ___ H2O → ___ H3PO4
___ Cl2 + ___ H2O → ___ HCl + ___ O2
Simple Stoichiometry
a. How many atoms of Na are present in a 34.5 g sample of Na metal?
b. How many atoms of K are present in a 58.8 g sample of K metal?
c. How many liters of O2 are present in a 60.4 g sample of O2 gas?
d. How many liters of NH3 are present in a 105.3 g sample of NH3 gas?
e. How many grams of HCl are present in a sample of 5.04 x 1024 atoms HCl?
f.
How many grams of H2 are present in a 13.2 L sample of H2 gas?
Stoichiometry (SHOW ALL WORK)
a. In the formation of rust, Fe metal reacts with O2 gas. If 6.3 moles of O2 gas is added to
the reaction, how many moles of rust will be produced in the following reaction?
4Fe(s) + 3O2 (g) → 2Fe2O3 (s) Rust
b. Consider the following balanced reaction:
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
If you fully react 360 grams of glucose (C6H12O6) with oxygen, then how many grams of
water will you produce?
c. Using the following equation:
2 NaOH + H2SO4  2 H2O + Na2SO4
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium
hydroxide and you have an excess of sulfuric acid?
d. Using the following equation:
____ KClO3 → ____ KCl + ____ O2
i. Calculate the molar mass of KClO3, KCl, and O2
ii. Balance the equation
iii. If you have 150 grams of KClO3 how many moles of O2 will you generate
in the reaction?
iv. If you produce 250 grams of KCl how many grams of KClO3 did you start
with?