Practice Problems – APS Final
Directions: When applicable identify all variables in the problem, write the correct
formula, show your work, give a solution including units.
1. Define Accuracy and Precision. Are the following data accurate if the accepted value
for beats per minute is 72?
Accuracy:
Trial
Beats per minute
1
60
2
61
3
60
Precision:
4
59
5
60
Are these values accurate? Precise? Why?
2. The density for solid gold is 19.30 g/cm3. What volume does 521.1g of solid gold
occupy?
3.
How many proton, electrons, and neutrons are in an atom of Fr-223?
4. Write the electron configuration for the following elements. Identify the number
of valence electrons and draw a dot diagram.
a. Ne-20
b. Cl-35
c. Al-27
5. Calculate the Gram Formula Mass of the following:
a. H2SO4
b. Sr(OH)2
c. C6H12O6
6. If one mole of C6H12O6 has a mass of 180.18g
a. How many moles are in 540.54g of C6H12O6?
b. How many particles are in 3 moles?
7. Balance: To the left of the reaction determine the type of reaction shown.
a. ___Cu
+ ___HNO3
 ___Cu(NO3)2 + ___NO2 + ___H2O
b. ___NH3
c. ___C6H6
+
+
___O2
___O2

___NO

___CO2
+
___H2O
+
___H2O
8. A tow truck exerts a net horizontal force of 1050N on a 760kg car. What is the
acceleration of the car during this time?
Practice Problems – APS Final
9. A 38kg canoe broke free from the dock and is floating down river at a speed o
2.2m/s. What is the canoe’s momentum?
10. A girl lifts a 160N load a height of 1m in 0.5 seconds.
a. Does the girl do any work?
b. If so calculate how much.
c. What is the girl’s power?
11. A 20kg object is thrown from a plane. The object starts at rest and falls for 10
seconds.
a. At the end of the 10 seconds what is the objects final velocity?
b. What is the weight of the object?
12. Cart A has a mass of 20kg and is traveling to the right, towards Cart B, at a
velocity of 5m/s. Cart B has a mass of 40kg and is at rest when the collision
occurs. After the collision Cart A is at rest. What is the velocity and direction of
Cart B?
13. A light bulb with a resistance of 4.5 ohms is connected to a circuit with a current
of 2.6 amps. What is the voltage?
14. 4L of O2 gas at room temp is heated to 100ºC at constant pressure. What is the
final volume of the heated gas?
15. 10L of gas is at a pressure of 1 atm. If the pressure is increased to 4 atms what is
the new volume of the gas?
16. State the law of Conservation of Energy. If a 10kg ball rests on the ground and is
thrown to a height of 10 meters:
a. What is the Potential Energy at its highest point?
b. What is the maximum Kinetic Energy?
c. Where does the ball have maximum Kinetic Energy?
17. 5L of gas at STP (Pressure= 101.3kPa) is compressed into a 0.5L can. What is the
pressure of the gas?
18. A car travels 50 meters in 2 seconds. What is the velocity (speed) of the car?
19. A runner starts with a velocity of 2 m/s and accelerates to a velocity of 6 m/s in 3
seconds. What is the acceleration of the runner?
Practice Problems – APS Final
20. A 500kg boulder rolls towards your house an acceleration of 2 m/s2. With what
Force will the boulder plow into your home?
21. A 2000kg car travels with a velocity of 10 m/s. What is the car’s momentum?
22. A cart is pushed 20 meters with a Force of 20N. How much work is being done?
23. A 5kg ball starts on the ground at rest and is thrown 40 meters into the air. How
much potential energy does the ball have at the height of its climb?
24. As the ball returns to earth, it gains velocity. What is the balls maximum possible
kinetic energy?
25. Determine the density of an object that has a mass of 45.5g and a volume of 9.5cm3?
26. What is the mass of an object with a density of 5.5g/cm3 and causes a graduated
cylinder filled with water rise from 20mL to 24.6mL?
27. Determine the electron configuration of O?
28. How many valence electrons?
29. Determine the electron configuration of Ca?
30. How many valence electrons?
31. If a gas has a volume of 4.0L at constant pressure at 25 degrees Celsius, what is the new
volume of the gas if the temperature is raised 45 degrees?
32. 5.5L of gas at 1atm of pressure at constant temperature. If the pressure of the gas is
increased to 2atm what is the new volume?
33. Balance the following equations and determine the type of reaction:
34. Determine the Gram Formula Mass of ZnCl2
What is the mass of 5.5moles of ZnCl2?
Determine the GFM of CH3COOH
How many moles of CH3COOH are in 33.712 x 1023 molecules?
Show the Lewis Dot structure for
Na
Cl
What kind of bond would form?
Write the formula and name the compound.
Show the Lewis Dot Structure for
Ca
F
Write the formula for the compound that would result from a reaction between Fe (II)
and O. Name the compound.
43. Write the formula that would results from NH4 and N. Name the compound.
35.
36.
37.
38.
39.
40.
41.
42.
Practice Problems – APS Final
A.
B.
C.
D.
E.
# of protons
Atomic Number
Mass Number
Symbol of element
Isotope notation
Energy Level
A. # of protons
B. Atomic Number
C. Mass Number
D. Symbol of element
E. Isotope notation
Sublevels
Electrons per
Sublevel
A. # of protons
B. Atomic Number
C. Mass Number
D. Symbol of element
E. Isotope notation
Total Electrons
1
2
3
4
Write the electron configuration and orbital notation for the following isotopes:
1.
2.
3.
4.
5.
6.
7.
8.
He-4
Li-7
N-14
F-19
Ne-20
Ca-40
Br-70
Mg-24
Practice Problems – APS Final
44. List as many physical properties of water that you can think of. Do the same for
bleach. Which traits do they share? Where do they differ?
45. The density of Aluminum is 2.7g/cm3. If you have 500g of aluminum, what
volume of space does it occupy?
46. Determine the density of a substance that has a mass of 45.9g and occupies
5.3cm3.
For the following pairs of elements:
1. Classify them as metals or nonmetals.
2. Decide if they are stable or unstable.
3. If they are unstable determine the type of bond that would form between then.
NOTE: You may need more than one atom of a particular element to complete the
molecule!
4. If the bond is ionic: draw the Lewis Dot structures and indicate where the electron
transfer occurs. Finally write the resulting charge of each ion formed.
5. If the bond is covalent: draw the Lewis Dot structures, circle the potential shared
pairs of electrons, rewrite the Lewis Dot structures with the shared pairs in
between the symbols for the atoms, and finally represent the shared pairs with
solid lines. Identify the type(s) of covalent (single, double, triple) existing.
1. Na
2. Mg
3. He
4. O
5. O
F
O
Ne
O
H
6. C
7. N
8. Li
9. Fr
10. C
Cl
N
Cl
Br
O
Please solve the following Gas Law problems using the Combined Gas Law.
Follow our format: Write the formula, create a list of what is given (remember to convert
Temperature to Kelvin), eliminate what you don’t need, substitute into the formula and
solve (include units)!
1. 4L of Helium gas at room temperature is heated to 100ºC. What is the new
volume of the gas?
2. Under normal conditions 10L of air is under 101.3kPa of pressure. If the pressure
is increased to 202.6kPa what is the new volume of the air?
3. Please write the formulas for Boyle’s Law and Charles’ Law. Also include what
these laws state.
4. A gas at 0ºC has a volume of 2.5L. The gas is heated to 50ºC. How much space
does the gas occupy now?
Practice Problems – APS Final
5. A new volume of O2 gas was measured to be 12L after it was heated from 25ºC to
75ºC. What was the original volume of the O2 gas?
6. Normal air pressure on 6L of N2 gas is 1atm. If the gas is condensed into a
volume of 1L, what is the new pressure of the gas?
7. The pressure on 4L of air is increased from 101.3kPa to 405.2kPa. How much
space would the gas take up under this pressure?