# Midterm Review

Name_________________________
Date_____
Period___
Part 1: Answer the questions in the space provided. If there are formulas or calculations involved, please show ALL
work.
1. Calculate the density of a sample of copper with a mass of 409.472g occupying a space of 45.7cm3.
2.
a.
Aluminum has a density of 2.7g/cm3 at room temperature. What volume does a sample of aluminum
occupy that has a mass of 224.64g?
b. If the sample of aluminum is heated to completely melt the sample the volume of the melted aluminum
is now 84.5mL. What is the density of the aluminum?
3. 23000mg of water are cooled from 99&deg;C to 43&deg;C. What is the heat involved?
4. Create a change of phase diagram for the substance propanol. Propanol melts at -127&deg;C and boils at 97&deg;C.
a.
At room temperature (25&deg;C) what phase of matter is propanol?
b.
What is the condensation point of propanol?
5. Calculate the heat involved if 564.5g of gold is heated from 40&deg;C to 75&deg;C.
6. 204.3g of aluminum are completely solidified. How much heat is involved?
7. 105g of water are heated from 25&deg;C to 115&deg;C. Calculated the heat involved.
8. For each of the following phases explain how the molecules are organized in relationship to one another. Explain
the relative kinetic energy in each phase.
a. Solid
c. Gas
b. Liquid
9. A mass of 38.5g of iron are heated to 100&deg;C. The heated iron is place directly into a 43.5g sample of water at
25&deg;C. The iron and the water are allowed to equilibrate. The water reaches a final temperature of 54&deg;C. What is
the calculated specific heat of the iron?
1. In a closed system, where n is constant, and the pressure is constant, the temperature of Ne (Neon)
gas begins at 500.&deg;C and is cooled to 250.&deg;C. The starting volume of Ne was 2100 mL. What’s the new
volume of Ne gas?
2. In a closed system, where n is constant and the temperature is constant, if a gas has a volume of 50L
under 1atm of pressure is compressed to a volume of 12.5L, what is the new pressure?
3. In a closed system, where n is constant and the volume is constant, if the temperature of a gas at 550
mmHg is raised from 233&ordm; C to 425&ordm; C, what is the new pressure?
Part 2: For each of the following convert the values into the requested units. Then determine the number of
significant figures for the converted value. Show all work.
1.
2.
3.
4.
4.
5.
6.
7.
8.
41.2cm into km:
610002μg into g:
603km into mm:
27.4hm into 𝜇𝑚:
Value
Scientific Notation
Significant Figures
2001.4g
421km
72.5g
440mL
40m
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Part 3: Electron Configuration and Atom Fun
Write the electron configuration and orbital notation for the following:
1. sodium________________________________________________
2. iron ______________________________________________
3. bromine________________________________________________
4. barium ________________________________________________
5. Ca-40
6. Ga-70
Identify the element based on the following:
1. 1s22s22p5___________________
2. 1s22s22p63s23p4________________
3. 1s22s22p63s23p64s23d7_______________
4.
______________________
5. Caron has 3 naturally occurring isotopes. The percent abundance of these three isotopes are:
C-12 (98.929%)
C-13 (1.07%)
C-14 (0.001%)
Calculate the average atomic mass of Carbon.
6. Chlorine has two naturally occurring isotopes. These isotopes Cl-35 and Cl-37 have a percent abundance of
75.78% and 24.22% respectively. What is the average atomic mass of Chlorine?
7. For each of the following determine the number of protons, electrons and neutrons. Also write down the
predicted electron configuration, and orbital notation.
a. He-4
b. Na-23
c. N-14
d. As-75
e. Cl-35
f. C-13
g. Kr-84
h. Ar-40
8. What does the Aufbau principle state?
9. Draw the nucleus of the three isotopes on Hydrogen. Name them. Show the number of protons and neutrons
and the isotope notation. Represent the neurons as white circles and the protons as black or blue circles
(depending on what color pen you are using).
10. Determine the electron configuration for an atom of C-12 that has one excited electron from 2s  2p. Show the
orbital notation as well.
11. When the excited electron falls back to the ground state what happens to the Carbon atom?
12. Determine the electron configuration for an atom of Mg-24 that has one excited electron from the 3s  3p.
Show the orbital notation for the ground state AND the excited state!
13. Determine the numbers of protons, electrons, and neutrons, electron configuration, and orbital notation for Cr52 and Cu-64.
Formula
Type of Bond
Name of compound
1) NO2
2) NaBr
3) SiO2
4) P2Br4
5) FeSO4
6) SF6
7) Li2S
8) MgBr2
9) Be(OH)2
10) SO3
11) Cu2S
12) BF3
Name
13) carbon monosulfide
15) oxygen difluoride
16) gold(I) phosphate
17) triboron tetrahydride
18) aluminum carbonate
19) dinitrogen heptoxide
20) dinitrogen trioxide
22) aluminum oxide
23) disulfur trichloride
24) cobalt(II) acetate
25) ammonium cyanide
Type of Bond
Formula
Determine the shape and polarity of the following molecular compounds. Draw the Lewis Structure:
Compound
Lewis Structure
Geometry
(shape)
1. CO2
2. BF3
3. PH3
4. SiCl4
5. H2S
Bonds
Molecule
(polar/nonpolar)