AP Chemistry Fall Final Exam 2015 Practice Worksheet 1
1. In most of its compounds, this element exists as a monatomic cation.
a. O
b. Cl
c. Na
d. N
e. I
2. This element may form a compound with the formula CaXO4.
a. Se
b. Cl
c. P
d. Na
e. He
3. Manganese, Mn, forms a number of oxides. A particular oxide is 69.6% Mn.
What is the simplest formula for this oxide?
a. MnO
b. Mn2O3
c. Mn3O4
d. MnO2
e. Mn2O7
4. What mass of Au is produced when 0.750mol of Au2S3 is reduced completely
with excess H2?
5. Gold (III) oxide, Au2O3, can be decomposed to gold metal, Au, plus oxygen
gas, O2. How many moles of oxygen gas will form when 221g of solid gold
(III) oxide is decomposed?
6. How many grams of calcium nitrate, Al(NO3)3 contains 24g of oxygen atoms?
7. _____ C4H11N(l) + _____ O2(g)  _____ CO2(g) + _____ H2O(l) + _____ N2(g) Balance this.
8. _____ KClO3  _____ KCl + _____ O2 After the equation is balanced, how many
moles of O2 can be produced from 4.0mol of KClO3?
9. A solution containing 0.20mol of KBr and 0.20mol of MgBr2 in 2.0L of water
is provided. How many moles of Pb(NO3)2 must be added to precipitate all
the bromide as insoluble PbBr2?
10. When the following equation is balanced, it is found that 1.00mol of C8H18
reacts with how many moles of O2? ____ C8H18 + _____ O2  ____ CO2 + ____ H2O