Chemistry Worksheet: Quantitative Chemistry
Matching
Match the terms below with their correct definitions.
A.
E.
1.
2.
3.
4.
5.
6.
7.
8.
B.
F.
C.
G.
D.
H.
Isotope in which the number of neutrons is six more than the isotope’s atomic number
Copper-63
Copper with seven neutrons more than its atomic number
Isotope that has one neutron more than its number of protons
Carbon with equal numbers of neutrons, protons, and electrons
Carbon with two more neutrons than its number of protons
Chromium with two more neutrons than its number of protons
Isotope in which the difference between the neutrons and number of protons is 4
Short Answer
9. The accepted amount of salt crystals produced in a lab is 13.22g. When you performed the
lab, you only produced 8.32g. Calculate your percent error.
10. Accepted amount of a crystal produced in a lab is 5.61g. When you performed the lab, you
produced 5.58g. I told you once that in one of my chemistry labs our percent error had to be
less than 0.5% to pass the lab. So, did you pass this lab?
11. Convert 83.62km/h to m/s.
12. The radius of a helium atom is 31pm. What is the radius in nanometers?
13. The law of conservation of mass states that during a chemical reaction, total mass is ____.
14. The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a
volume of 1.50 cm3?
15. The density of pure diamond is 3.5 g/cm3. What is the volume of a diamond with a mass of
0.25 g?
16. What is the density of 37.72 g of material whose volume is 6.80 cm3?
17. 1.06 L of water is equivalent to
18. The number of grams equal to 0.5 kg is
19. How many minutes are in 1 week?
20. Which of these measurements has been expressed to three significant figures;0.052g,
0.202g, 3.065, 500g?
21. How is the measurement 0.000 065 cm written in scientific notation?
22. When 1.92 X 10–6 kg is divided by 6.8 X 102 mL, the quotient equals
23. When 6.02 X 1023 is multiplied by 9.1 X 10–31, the product is
24. If 63.5 g of copper (Cu) combine with 16 g of oxygen (O) to form the compound CuO, how
many grams of oxygen will be needed to combine with the same amount of copper to form the
compound CuO2?
25. What is the volume of a salt crystal measuring 2.44 10 m by 1.4 10 m by 8.4 10
m?
Commonly Used Metric Prefixes
Prefix
Meaning
Factor
mega (M)
1 million times larger than the unit it precedes
10
kilo (k)
1000 times larger than the unit it precedes
10
deci (d)
10 times smaller than the unit it precedes
10
centi (c)
100 times smaller than the unit it precedes
10
milli (m)
1000 times smaller than the unit it precedes
10
1 million times smaller than the unit it precedes
micro ( )
10
nano (n)
1000 million times smaller than the unit it precedes
10
pico (p)
1 trillion times smaller than the unit it precedes
10
26. What is the quantity 0.0075 meters expressed in centimeters? Use the table above to help
you.
27. What is the quantity 7896 millimeters expressed in meters? Use the table above to help you.
28. What is the quantity 987 milligrams expressed in grams? Use the table above to help you.
29. Which of the following equalities is NOT correct? Use the table above to help you.
100 cg= 1g
1000mm = 1m
1 cm3 = 1mL
10kg = 1g
30. If E is the symbol for an element, which two of the following symbols represent isotopes of the
same element?
1.
E
2.
E
3.
E
4.
E
31. Which of the following sets of symbols represents isotopes of the same element?
J
J
J
L
L
L
M
Q
Q
M
M
Q
32. How is the number of neutrons in the nucleus of an atom calculated?
33. In which of the following is the number of neutrons correctly represented?
F has 0 neutrons.
As has 108 neutrons.
Mg has 24 neutrons.
U has 146 neutrons.
Chemistry Worksheet: Quantitative Chemistry
Answer Section
MATCHING
1.
2.
3.
4.
5.
6.
7.
8.
H
B
F
A
C
E
D
G
SHORT ANSWER
9. 37.07%
10. No
11. 23.23m/s
12. 3.1x10-2nm
13. the same
14. 4.05 g
15. 0.071 cm3
16. 5.55 g/cm3
17. 1060 mL.
18. 500.
19. 10 080 min
20. 0.202 g
21. 6.5 X 10–5 cm
22. 2.8 X 10–9 kg/mL.
23. 4.3 X 10–7.
24. 32 g
25.
26.
27.
28.
29.
30.
31.
2.9 10 m
0.75 cm
7.896 m
0.987 g
10 kg = 1 g
1 and 4
M
M
M
32. Subtract the number of protons from the mass number.
33.
U has 146 neutrons.