1. Ch. 1 Test – Self Review
Honors Chemistry

2. Pure Substance or Mixture?
Determine whether each of the following is a homogenous mixture, heterogeneous mixture, element, compound.
sugar water
Sugar (sucrose)
A bucket of marbles
Gold

3. Pure Substance or Mixture?
Determine whether each of the following is a homogenous mixture, heterogeneous mixture, element, compound.
sugar water homogenous mixture
Sugar (sucrose) compound
A bucket of marbles heterogeneous mixture
Gold element

4. Physical or Chemical Change?
Determine whether each of the following is physical or chemical change.
Boiling water
Cutting a piece of bread
Melting wax
Baking Bread

5. Physical or Chemical Change?
Determine whether each of the following is physical or chemical change.
Boiling water physical change
Cutting a piece of bread physical change
Melting wax physical change
Baking Bread chemical change

6. Match the statements Precision Accuracy Distillation Chromatography
_____Separates a homogeneous solution based on differences in boiling points
_____Several measurements close to one another
_____Separates a mixture based on differences in solubility
_____Measurements close t the true or accepted value
_____Separates solid & liquid mixture based on particle size
Precision
Accuracy
Distillation
Chromatography
Filtration

7. Match the statements Precision Accuracy Distillation Chromatography
__C__Separates a homogeneous solution based on differences in boiling points
__A__Several measurements close to one another
__D__Separates a mixture based on differences in solubility
__B__Measurements close t the true or accepted value
__E__Separates solid & liquid mixture based on particle size
Precision
Accuracy
Distillation
Chromatography
Filtration

8. Measurements & Data
State whether the following data is intensive or extensive and whether it is quantitative or qualitative:
The chlorine gas is green in color.
The density of the substance is 1.33 g/mL
3) The volume of the helium gas is 23 cm3

9. Measurements & Data
State whether the following data is intensive or extensive and whether it is quantitative or qualitative:
The chlorine gas is green in color.
intensive & qualitative
2) The density of the substance is 1.33 g/mL
intensive & quantitative
The volume of the helium gas is 23 cm3
extensive & quantitative

10. States of Matter
Describe each of the three states of matter. Be sure to include a description of if they each have definite or indefinate shapes & volumes, state a distinguishing properties for each, and give 1 elemental example of each.

11. States of Matter
Describe each of the three states of matter. Be sure to include a description of if they each have definite or indefinate shapes & volumes, state a distinguishing properties for each, and give 1 elemental example of each. Solid – definite shape & volume, partciles are closely packed in ridged order & not compressible, example = iron Liquid – indefinate shape & definite volume, particles close together & can flow, example = mercury or bromine Gas – indefinite shape & volume, fills the volume of its container & particles very far apart, example = neon

12. Measurements & Data
State whether the following scenarios represent high accuracy and high precision, low accuracy & high precision, or low accuracy and low precision.
Three volume measurements of a 4.2 mL give the following results: 2.2 mL, 3.2 mL, and 6.6 mL.
The density of water at room temperature is calculated to be g/mL, g/mL, and g/mL.
The mass of a paper clip (actually 1.2 g) is found to be g, 0.57 g, and 0.52 g.

13. Measurements & Data
State whether the following scenarios represent high accuracy and high precision, low accuracy & high precision, or low accuracy and low precision.
Three volume measurements of a 4.2 mL give the following results: 2.2 mL, 3.2 mL, and 6.6 mL.
low accuracy & low precision
The density of water at room temperature is calculated to be g/mL, g/mL, and g/mL.
high accuracy & high precision
The mass of a paper clip (actually 1.2 g) is found to be g, 0.57 g, and 0.52 g.
low accuracy & high precision

14. Metric Conversions: (set them up w/dimensional analysis)
100 mm = ____________ dm
15.0 cm = _____________ km
0.65 km = _____________ m
134,076 nm = ______________ m

15. Answers: 100 mm = 1 dm 15.0 cm = 1.50 x 10-4 km 0.65 km = 650 m
134,076 nm = x 10-4 m

16. Significant Figures/ Scientific Notation
Identify the # of significant figures and rewrite in scientific notation.
160000
160700
160.0
0.0160

17. Answers:
Identify the # of significant figures and rewrite in scientific notation.
(2) 1.6 x 105
(4) x 105
(3) 1.67 x 10-4
(4) x 102
( 3) 1.60 x 10-2

18. Complete the following problems using Sig. Figs.=
24.5 x 0.25 x =
(76.2 x 15) = 4

19. Answers: 103.36 + 12.097 + 11 = 126 ( 0 deci. places)
24.5 x 0.25 x = 610 (2 sig. figs)
(76.2 x 15) = 300 (1 sig. fig) 4

20. Use Dimensional Analysis and sig. figs to solve the following:
If the average student walks 3.63 miles around the school in a day, how many kilometers is this?
A piece of magnesium with a density of g/cm3 is found to have a volume of 15,600 µL. What is the mass of this piece of Mg?

21. Use Dimensional Analysis and sig. figs to solve the following:
If the average student walks 3.63 miles around the school in a day, how many kilometers is this?
3.63 mi ft in cm m km = 5.84 km
1 mi ft in cm m
A piece of magnesium with a density of g/cm3 is found to have a volume of 15,600 µL. What is the mass of this piece of Mg?
1.74 g cm mL L ,600 µL = 27.1 g
1 cm mL L µL