Worksheet : Ch. 1-3 -Test Reviewdate

ChemistryName :

Worksheet : Ch. 1-3 -Test reviewDate :

1. What are the absolute and relative errors of the measurement of 322.70 g obtained for the mass of a certain precipitate when the accepted value is 322.95 g?

2. If four consecutive measurements were made of the volume of a sample of carbon disulfide and the values of 22.5 mL, 22.1 mL, 23.2 mL and 21.9 mL were obtained, what is the absolute deviation of each measurement and how should you express the final value?

3. Convert the following numbers to or from scientific notation :

______620 040 000

______.0000030034

______8.550 x 102

______8.01 x 10-5

4. Determine the number of significant figures in each of the following numbers :

_____ 75.080

_____0.04070

_____ 9.50 x103

5. Perform the following calculations and write the answers using the correct number of significant digits.

______413.0 x 10.0

______349.2/21.8

______3.2332 + 10.83

______78.0 - 52.65

6. Metric conversions :

a. How many grams are there in 2.2 x 1014 pg (picograms)?

b. How many liters are there in 2.56 kL?

c. How many cg are there in 12.5 kg?

d. How many kg are there in 2.1 x 105 mg?

e. How many mL are there in one km3?

f. How many nm3 are there in one m3?

7. Convert-35.0 ºC, 45.0 ºC and 120.0 ºC into Kelvin degrees.

8. Convert 423.0 K, 471.0 K and 200.0 K into Celsius degrees.

9. A bar of gold has a volume of 23.2cm3 and a mass of 447.76g. What is the density of gold?

10. Using the density of gold calculated above, what would the mass of a 22.4cm3 of gold be?

11. Water has a density of .99823 g/mL at 20 ºC. If lead has a density of 11.4 g/cm3 (equals 11.4 g/mL) what is the specific gravity of lead?

Answers : 1. Ea = .25g, Er = .077% 2. Da = .1 mL, .3 mL, .8 mL, .5 mL ; ans. = 22.4 mL + .43 mL 3. 6.2004 x 108, 3.0034 x 10-6, 855.0, 0.0000801 4. 5,4,3 5. 4130, 16.0, 14.06, 25.4 6a. 220 g 6b. 2 560 L 6c. 1.25 x 106 cg 6d. .21 kg 6e. 1015 cm3 6f. 1027 nm3 7. 238 K, 318 K, 393 K 8. 150 ºC, 198 ºC, -73 C 9. 19.3 g/cm3 10. 432g 11. 11.4

Chemistry-CPName:

Crossword: Ch. 1-3: obj 18-46Date:

Across

4. basic metric unit of mass

6. an insoluble solid formed in a chemical reaction

8. ______energy is the energy of moving electrons

13. ______energy is the energy stored in the chemical bonds of a substance

16. a measure of how close a measurement is to the accepted value

17. a measure of the average kinetic energy of the particles of a substance

19. the amount of space that an object occupies

21. a measure of accuracy

23. ______measurements are numerical

24. a substance that forms in a chemical reaction

Down

1. a device used to measure the specific gravity of a liquid

2. the basic metric unit of energy

3. ______energy is the energy stored in the mass of nuclei

5. (two words) temperature at which all motion ceases

6. ______energy is stored energy or energy of position

7. ______measurements are nonnumerical and are descriptive only

9. (two words)is a comparison of the density of a substance to the density of a reference substance (usually water)

10. the basic metric unit for length

11. ______energy is the energy of motion

12. a measure of how reproducible of a measurement is

14. a substance that changes in a chemical reaction

15. the pull of gravity on an object

18. ______energy is the energy of the moving particles of a substance

20. ______energy is the energy of a moving object

22. (two words)the basic metric unit for volume

25. ______energy is energy that travels in electromagnetic waves

26. the ratio of the mass of an object to its volume