Honors Chemistry Written Final Exam
Practice Test
1. Use the graph below to answer questions a-g:
a) What would be the mass of the substance if it has a volume of 15 cm3?
75 grams
b) What would be the volume of the substance if it has a mass of 175 g?
35 cm3
c) What is the density of the metal represented in the graph?
Density =
=
= 5.0 g/cm3
d) Calculate the mass of the substance above it takes up a volume 85 cm3.
Density =
5.0 =
m = 425 g = 430 g
e) Calculate the volume of the substance above it has a mass of 325 grams.
Density =
5.0 =
V = 65 cm3
f) Would this substance sink or float in water and why?
This substance would sink since it is more dense than water (water is 1 g/cm3)
g) What does the slope of the line represent?
The density of the substance
For question h-i, use the graph to the right:
h) If the two substances were mixed together as liquids, which
substance would sink to the bottom? How do you know?
A
Substance A is more dense since the slope of its line is
steeper (you could have actually calculated density too) so
substance A will sink.
i) Which would occupy a larger volume: 50 grams of substance A or 50 grams of substance B? Explain.
Since Substance B is has a lower density and you are comparing equivalent masses, Substance B would have
to be taking up a larger volume.
B
2. strontium + tin(II) sulfate
a) Write the formulas for the reactants __Sr + SnSO4_____________
b) Write the names of the products ___strontium sulfate and tin__________________
c) Write the formulas for the products _ SrSO4 + Sn______________________________________
d) Write the balanced equation _ Sr + SnSO4--> SrSO4 + Sn _______________________
e) What is the oxidation state (charge) for each of the cations? _Sn+2 and Sr+2_______________
f) What is the oxidation state (charge) of the anion? _SO4-2__________________
g) How many sulfurs are on the products side? __1___________
h) What is the electron dot structure of sulfur? _:S:________
i) What type of reactions is this? _single replacement_____________________________
3. ammonium carbonate + sodium nitrate
a) Write the formulas for the reactants __(NH4)2CO3 + NaNO3____________________________________
b) Write the names of the products _sodium carbonate and ammonium nitrate ____________________
c) Write the formulas for the products _Na2CO3 + NH4NO3________________________________________
d) Write the balanced equation _(NH4)2CO3 + 2NaNO3  Na2CO3 + 2NH4NO3______
e) What is the oxidation state (charge) for each of the cations? _NH4+1 and Na+1_________________
f) What is the oxidation state (charge) for each of the anions? _CO3-2 and NO3-1________________________
g) How many sodiums are on the products side? _2_______
h) What is the electron dot structure of sodium? _Na________
i) What type of reactions is this? __double replacement________