Review Questions for Chapter 2 test Name_____________________

Know definitions of bold face words in chapter 2

Know definition of chemistry, law and theory in chapter 1

Know definitions of all bold-faced terms on pages 556-560

Chapter 2

Property Physical or chemical Intensive or extensive

1.Melting point

2.Wood burns in air

5. Freezing point

6. Silver tarnishing

7. Silver nitrate and sodium

chloride form a precipitate

8. volume

9. mass

Identify the following as a physical (P) or chemical (C) change: 10. boil ____ 11. exploding a firecracker ____

12. grinding chalk____ 13. freezing water ______

14. Reacting zinc and hydrochloric acid an releasing hydrogen gas

For the following statements. Decide if the statement is describing a solid, liquid, gas

15. Definite shape, definite volume____________ 16. High kinetic energy______________

17. Smallest distance between particles_______ 18. Indefinite shape and volume__________

19. Particles are not attracted to one another___________

Classify the following as either a homogeneous or heterogeneous mixture, a compound, or an element

20. Diamond (made up of only carbon)__________________ 21. water___________________

22. Salt water solution _____________________ 23 air___________________________

24 chicken noodle soup ____________________ 25. gold_____________________________

How many phases do each of the following mixtures have?

26. carbon, sand, water and sugar mixture

27. sulfur and iron mixture

28. sugar and water mixture

29. stainless steel alloy

30.air

34 List the four signs of a chemical change:

---------------------------------------------------------------- --------------------------------------------------

--------------------------------------------------------------- --------------------------------------------------

35. Identify each element as a :

transition metal metalloid alkali metal

halogen, alkaline earth metal noble gas:

______1. iron _______ 2. Manganese ________3. antimony _________4. argon

________ 5.Chlorine ________6. Magnesium 7. ______________Lithium

39. Are the following Changes Physical or Chemical Changes?

__________________________________________________________________

Review

1. You need to know the difference between accuracy and precision.

2. You need to know you metric measurements and base units.

3. You need to know your metric prefixes.

4. How many significant digits are there in:

120 0.00120 0.0000012 1001 11.001

1 x 103 1.04 x 10

4 6.012 x 10

9 1.000 x 10

5

5. Infinite numbers of significant digits

6. Absolute Zero

7. Convert the following from K to oC

10 50 273 373 37

310 -43 500 200 -273

8. Kelvin temperatures are always ________________er than oC.

9. Convert the following from oC to K

10 50 273 373 37

310 -43 500 28 -273

11. The oC temperature is always __________________ er than the Kelvin temperature.

12. Round the following to 2 significant digits:

23.456 34.56 34.5 35.5 35.6

234 560 345 600 345 000 355 000 200

13. Solve the following problems to the correct number of decimal places.

5.600 + 8.7 + 2 8.9 – 0.005 – 0.05

14. Solve the following problems to the correct number of significant digits.

500/2.5 2.5/500

2.5 * 500.0 2.5 * 500

250 * 250.0 250/250.000

14. Write the following in scientific notation

5 000 000 000 5 000 000 000.000

5 000 000 5 000 001

5 5.000

0.005 0.005 000

0.5 0.50

0.000 005 0.000 005 001

15. When you convert a number less than 1, the exponent is always _________________.

16. When you convert a number more than or equal to 1, the exponent is always ______.

17. Convert the following from scientific notation to standard notation

1 x 105 1.007 x 10

6

8.7 x 104 1.9 x 10

8

1 x 10-5

1.007 x 10-6

8.7 x 10-4

1.9 x 10-8

18. Positive exponents always give you a number that is _________ than ___________.

19. Negative exponents always give you a number that is ________ than ___________.

20. For the following problems, be sure that your answer is in scientific notation and that

it has the correct number of significant digits.

(3.1 x 103) + (3.1 x 10

2).

(3.1 x 104) - (3.1 x 10

3)

(3.1 x 103) x (3.1 x 10

-2)

(3.1 x 105) (3.1 x 10

-9)

(1.2 x 102) x (4.5 x 10

-3)

(7.8 x 10-2

) x (9.2 x 105)

Calculate the percent error if you did a lab in which you found the density of a piece of

Al to be 2.34 g/cm3. The actual density of Al is 2.70 g/cm

3.

There are 2.2 pounds in a Kg. Using dimensional analysis, to show how the weight of a

101 Kg person.