Pre-College Chemistry and Math
Answers to the questions follow the test.
1. Muddy water from the
Mississippi River is an example of
A. an element
B. a pure substance
C. a mixture
D. a compound
2. Name and give the abbreviation for the UNIT used in the Metric System to
measure each of the following:
A. volume
B. temperature
C. length
D.
mass
3. Mathematically
define the following prefixes and
give their abbreviations:
A. milli-
B. kilo-
C. nano-
D.
centi-
4. Make the
following conversions:
A. A snail travels 15 centimeters in 10 minutes.
How many minutes will it take for the snail to go 4.50 meters?
B. Methyl monine evaporates at a rate of 50.0
mg per hour. How long will it take for 10.0 kg to evaporate?
5. Make the
following conversions:
A. If a ml of mercury weighs 13.6 gm, how many
pounds would 2.0 cubic feet of mercury weigh?
B. A bee is flying at 10.0 miles per hour. What
is
this in centimeters per second?
6. Make the
following temperature conversions (Even if you have a calculator that makes
the conversions for you, or if you know the answer, set up the equation(s)
needed to make the conversions):
A. 35oF to oC
B. -150oC to oF
7. An atom is the smallest particle of
A. a compound
B. the nucleus
C. a mixture
D.
an element
8. Write the elemental
name or symbol of the
following:
A.
gold F. Na
B.
silver G. Fe
C.
oxygen H. Zn
D.
lead I. C
E.
potassium J. Al
9. State the
charge, mass and location in the atom for the electron:
10. Atoms with
the same ____________________ are atoms of the same element.
A.
atomic number
B. mass number
C.
number of electrons
D. number of neutrons
11. Name the elements
and tell how many atoms of each
there are in each of the following formulas. For instance, if there are two atoms
of zinc and three atoms of chlorine, write 2 zinc, 3 chlorine.
A. H2S
B. K2SiO3
C.
MgCl2
D.
SnBr4
12. A. What does an arrow
pointing up in a chemical
equation mean?
B. Where do you write the reactants of a chemical equation?
13. A teaspoonful of
salt is mixed with a cup of hot
soup to form a solution. Which is the solvent and which
the solute? Why?
14. The terms
"soluble" and "miscible" mean almost the same thing. Explain how they differ
in meaning:
A. Soluble refers to any solvent while miscible
refers only to liquid solvents.
B. Soluble means that solute dissolves while miscible
means that solvent does not dissolve.
C. Soluble refers only to liquid solutes while
miscible refers to any solute.
D. Soluble means there is a limit to solubility while miscible
means there is no limit to solubility.
15. Whole Numbers
A. 24 x 87 =
B.
65 x 8 =
98 - 72
16. Decimal Numbers
A. 5.75 + 0.026 - 0.50 =
B. 50 - 0.075 =
17. Percentage
A. 25% of 400 =
B.
25 = what %
400
18. Word Problems
A. How many boards that are 8 feet long and 6 inches wide will you need to make a fence that is 80 feet long and 8 feet high?
B. One "mole" of oxygen weighs 16 grams. How much will 8 moles weigh?
19. Negative Numbers
A. 16 + (-12) =
B. 28 + (-25) =
20. Exponential Notation
A. 105 x 104 =
B. 104/106 =
21. Basic Algebra
A. PV = nRT, n =
B.
50 = 5, v =
v
Answers to the Sample Test
1. C
2. A. liter; l or L
B. degree Celsius; oC
C. meter; m
D.
gram; g, gm or Gm
3.
A.
10-3 times; m-
B. 103 times; k-
C. 10-9 times; n-
D.
10-2 times; c-
4. A.
300 min
B.
200,000 hrs
5. A.
1696 lbs
B.
447 cm/sec
6. A.
C = F-32 = 35-32 = 1.67oC
1.8 1.8
B. F = 1.8C + 32 = (-150 x 1.8) + 32 = -238oF
7. D
8. A. Au F.
sodium
B. Ag G. iron
C. O H. zinc
D. Pb I. carbon
E. K J. aluminum
9. Charge is -1, mass is about 1/2000 dalton, located outside the nucleus
10. A
11. A. 2hydrogen, 1 sulfur
B. 2 potassium, 1 silicon, 3 oxygen
C. 1 magnesium, 2 chlorine
D. 1 tin, 4 bromine
12. A. The compound is a PRODUCT that is a GAS
B. To the left of the "yields" arrow
13. Solid salt dissolves (disappears) so it is the solute. The salt dissolves in the hot soup (the liquid), which is the solvent.
14. D
15. A. 2088
B. 20
16. A. 5.276
B. 49.925
17. A. 100
B. 6.25%
18. A. 160
B. 128
19. A. 4
B. 3
20. A. 109
B. 10-2
21. A. PV
RT
B. 10