Download Chapter 3 Test (Version 2.0) (1)

Metric Conversions
1. The human eye can detect wavelengths of light as short as 0.000037 cm. What is this
wavelength in nanometers?
A. 370 nm
B. 37 nm
C. 37000000 nm
D. 3.7 x 10-12 nm
Convert .0.000037 cm to nanometers
Question to help fill out the conversion table:
How many centimeters (cm) and a meter (m)?
How many nanometers (nm) in a meter (m)?
2. One gallon of gasoline (Volume: 3785 mL) has a mass of 2540 g. What is the density
of gasoline/
A. 1.49 g/mL
B. 0.671 g/mL
C. 1.00 g/mL
D. 1.67 g/mL
3. Your calculator’s answer is read from a(n) __________ display.
a. analog
b. Calibrated
c. Digital
d. scaled
4. Which of these is a non metric unit that is often used with SI prefixes?
A. Meter
B. Liter
C. Gram
D. ampere
5. What volume does a 1-carat (mass: 0.2 g) diamond occupy? (density = 3.27 g/mL)
a. 3.27 mL
b. 16 mL
c. 0.65 mL
d. 0.06 mL
6. The measurement 0.037010 m has how many significant digits?
A. 6
B. 5
C. 3
D. 4
7. A fraction equal to 1 that contains both the original unit and its equivalent value in an
new unit is called a(n)
A. Conversion factor
B. Exponential factor
C. Pure number
D. Derived unit
8. What indicates the precision of an instrument and helps scientists
report measurements honestly?
A. Unit analysis
B. Scientific notation
C. Significant digit
D. Unit of measurement
9. An instrument that is used to compare an object directly to a scale or that displays the
reading using a pointer is called a(n) ________________measurement. A. Analog
B. Non-decimal
C. Conventional
D. Digital
10. The scale of a measuring instrument is ________________, that is, accurately
subdivided into measurement units.
A. Standardized
B. Unitized
C. Graduates
D. enumerated
11. Which of these would yield a measurement with the greatest precision?
A. Oven thermometer
B. Pool thermometer
C. Oral medical thermometer
D. Outdoor weather thermometer
12. __________(T/F) When determining significant digits in multiplication and division
problems, the answer cannot contain more significant digits than the measurement with
the least number of significant digits.
13. __________(T/F)The number 0.00800 has three significant digits.
14. __________(T/F) The number 0.000980 mL should be expressed as 9.8 x 104mL in
scientific notation.
15.___________(T/F) If a scientist is extremely careful and uses precise instruments a
perfect measurement can be obtained.
16.___________(T/F) The unit for volume is derived from the SI unit for length (the
meter).
17. __________(T/F) When solving problems that involve compound calculations, it is
best to round off at each of the intermediate steps.
Matching Part 1: Match the letter of the prefix with the appropriate clue by writing the
letter in the blank. Answers will be used only once.
a. Centi
b. Deci
c. Kilo
d. Mega
e. Micro
f. Milli
g. nano_______18. Hundredth
_______19. Million
_______20. Tenth
_______21. Billionth
_______22. Thousandth
_______23. thousand
Matching Part 2: Match the letter of the power of 10 with the appropriate clue by writing
the letter in the blank. Answers will be used only once.
a. 106
b. 103
c. 10-1
d. 10-2
e. 10-3
f. 10-6
_______24. c
_______25. M
_______26. μ
_______27. d
_______28. k
_______29. M
Matching Part 3:
Match the letter of the description with the appropriate clue by writing the letter in the
blank. Answers may be used more than once.
A. Accurate but not precise
B. Precise but not accurate
C. Both accurate and precise
D. Neither accurate nor precise
______30. You measure products of a chemical reaction to be 6.15g, 6.16g, and 6.13g.
The actual mass is 6.14g.
______31. You measure products of a chemical reaction to be 4.12g, 3.25g, and 4.79g.
The actual mass is 2.25g.
______32. You measure products of a chemical reaction to be 1.56g, 1.59g, and 1.60g.
The actual mass is 3.62g.
Calculations:
33. You measure the mass of a product in a chemical reaction to be 1.87g. Theoretical
calculations predict that you should have obtained 1.95g. What is the percent error?
34. Which of these has the greatest number of significant digits: 35620 cars, 2.35m, or
25000mL?
35. Convert 463 kg to mg.
Question to help fill out the conversion table:
How many grams (g) in a kilogram (k)?
How many milligrams (mg) in a gram (g)?
36. Convert 342 mm to dm.
Question to help fill out the conversion table:
How many millimeters (mm) in a meter (m)
How many decimeters (dm) in a meter (m)
37. Perform the following operation, observing significant digits: (26.9 cm)(5.0m)
38. Perform the following operation, observing significant digits:
7.491m + 60.2m + 1.00224m
39. Perform the following operation, observing significant digits:
16.1mL -6.81mL - 0.00032mL
40. Find the volume in mL occupied by 454g of copper, which has a density of
8.92g/mL.