Review Questions for Chapter 2 test
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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:
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35. Identify each element as a :
transition metal
halogen,
______1. iron
metalloid
alkali metal
alkaline earth metal
_______ 2. Manganese
noble gas:
________3. antimony
_________4. argon
________ 5.Chlorine ________6. Magnesium 7. ______________Lithium
39. Are the following Changes Physical or Chemical Changes?
__________________________________________________________________
Review
1.
2.
3.
4.
You need to know the difference between accuracy and precision.
You need to know you metric measurements and base units.
You need to know your metric prefixes.
How many significant digits are there in:
120
0.00120
0.0000012
1 x 103
1.04 x 104
6.012 x 109
1001
11.001
1.000 x 105
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 106
8.7 x 104
1.9 x 108
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 102).
(3.1 x 104) - (3.1 x 103)
(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/cm3.
There are 2.2 pounds in a Kg. Using dimensional analysis, to show how the weight of a
101 Kg person.