Measring Test

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CHEMISTRY TEST

Unit One

Chapters 1 and 2

Select the best answer to each of the following questions:

  1. The study of the relationship between the structure and properties of matter, and the use of this knowledge to produce new materials is ___________.
  1. chemistry
  2. physics
  3. geology
  4. biology

 

2. The energy an object has due to its position relative to something that  is attracting it is ________.
  1. kinetic energy
  2. potential energy
  3. mass energy
  4. radiant energy

 

3. Which of the following objects has kinetic energy?
  1. A car parked at the bottom of a hill.
  2. A book on a table.
  3. A pencil rolling off the top of a table.
  4. A car parked at the top of a hill.

 

4. The idea that states that energy can be changed from one form to another but the sum total of energy in the universe remains the same is the _________
  1. law of conservation of mass
  2. law of conservation of energy
  3. law of conservation of momentum
  4. law of conservation of time

 

5. Which of the following descriptions of a puddle of water is quantitative?
  1. cold
  2. wet
  3. 5oC
  4. muddy

 

6. What is the SI base unit for the measurement of mass?
  1. liter
  2. gram
  3. mole
  4. kilogram

 

7. What is the SI prefix for one-hundredth?
  A. milli-
  B. nano-
  C. centi-
  D. kilo-

 

8. Which of the following is an example of a derived unit?
  1. time
  2. density
  3. length
  4. weight

 

9. The accepted value for the length of a metal rod is 22.6 cm. Which of   the following sets of measurements of this rod could be considered precise but not accurate?
  1. 20.4 cm, 20.2 cm, 20.5 cm
  2. 22.5 cm, 22.7 cm, 22.6 cm
  3. 24.6 cm, 23.7 cm, 25.9 cm
  4. 12.6 cm, 22.6 cm, 32.6 cm

 

10. A container holds 75 ml of mercury. If you were asked to calculate the mass of the mercury, which of the following would provide the needed information to perform the calculation?
  1. the temperature of the mercury
  2. the density of the mercury
  3. the height of the container
  4. the volume of the container

 

11. The term accuracy, when used in measurement, refers to :
  1. the closeness of the measurement to an accepted value
  2. the amount of uncertainty in the measurement
  3. the reproducibility of the measurements
  4. the closeness of the measurements are to each other

 

12. The last digit in any measured value is always _____________
  1. known
  2. 1
  3. 0
  4. an estimate

 

13. The prefix mega- means ____________
  1. million
  2. millionth
  3. thousand
  4. thousandth

 

14. Look at the picture and choose the correct reading for the ruler.

  1. 6
  2. 6.3
  3. 6.35
  4. 6.355

 

15. If you add a series of numbers, how many significant figures can the answer have?
  1. It depends on how many significant figures there are in the measured values.
  2. Only one because the last digit is always uncertain.
  3. It can have only as many places past the decimal point as there are in the least precise measured value.
  4. It can have only as many significant figures as there are in the least precise measured value.

 

FREE RESPONSE

In this section you must show all work and answer appropriate questions in complete sentences.

  1. List one quantitative property and two qualitative properties about yourself.

    2.  

     

     

  2. Perform the indicated operation and report your answers to the correct number of significant figures.
  1. 129/29.2 =
  2. 30.80/450 =
  3. (0.098)(24.5) =
  4. 3.540 - 0.0006 + 21.0 =

 

 

3. A 102.00 kg boulder is falling at a velocity of 20. m/s. If the formula for calculating

the kinetic energy of an object is KE = (0.5)(mass)(velocity)2, calculate the kinetic

energy of the falling boulder.

 

 

 

  1. In an introductory geology class, a student measures the density of a piece of granite to be 2.63 g/ml. His teacher informs him that the accepted value is 7.72 g/ml. Calculate the students percent error.

    2.  

     

  2. List the number of significant figures in each of the numbers stated in the following

    3. paragraph:

    Of the 204 cars sold this month, 90 had been driven fewer than 100.0 km. The average price per car was $12,890.63. The estimated miles per gallon on 27 of the cars was 32.0 in the city and 37.3 on the highway. The average loan was for $8500.00 at an average rate of 10.25% interest. Average commission was $190.05 per vehicle.

     

     

     

  3. A student determines the density of a piece of magnesium to be 5.54 g/ml. If the mass of the magnesium is 2.014 g, calculate the volume occupied by the metal.

    4.  

     

     

     

     

     

  4. Convert the following:
  1. 29.9 meters to kilometers

    2.  

     

     

     

     

  2. 0.006 deciseconds to megaseconds

 

 

 

 

 

8. Suggest appropriate SI units and prefixes for each of the following objects:
  1. the length of a book.
  2. the mass of an eyelash.
  3. The mass of an elephant