Substances and Mixtures
Dimensional Analysis & Metric Conversions
Conservation of Mass & Separation Techniques
Scientific Notation & Percent Error
Sig Figs
100
There are two types of pure substances, name them.
Elements and Compounds
100
What was the "Trick" Mr. Staiger taught you to remember how to convert between different metric prefixes?
King Henry Danced Merrily(base unit) Down Central Main
100
What does the law of conservation of mass state?
Matter/mass cannot be created nor destroyed, it must be conserved.
100
What is the measured value in the following problem:
A reaction between one mole of sodium and one mole of chloride should produce 42 grams of sodium chloride. In your experiment, the measured mass is 32.73 grams. Calculate the percent error of your experiment.
32.73 g
100
How many sig figs in the following measurement?
2,000 cm3
1
200
Two solid samples each contain sulfur, oxygen, and sodium, only. These samples have the same color, melting point, density, and reaction with an aqueous barium chloride solution. It can be concluded that the two samples are the same:
a. compound
b. element
c. mixture
d. solution
A! Same physical and chemical properties can only mean that it is the same substance!
200
Convert 20.0 cm to m
0.200 m
200
What physical property separates heterogeneous mixtures by particle size?
Filtration
200
Convert the following to scientific notation:
3000 cm
3.0 x 103 cm
200
How many sig figs in the following measurement?
0.0100 g
3
300
The classification for NaCl (aq) is...
homogeneous mixture/solution
300
Convert 2 kg to g
2000 g
300
This technique separates substances based on their differences in boiling point.
Distillation
300
Convert to standard notation:
4.21 x 102 m
421 m
300
What are the rules when adding/subtracting with sig figs?
The answer should be rounded to the same amount of decimal places as the given number with the least number of decimal places.
400
What does aqueous mean?
Dissolved in water
400
How many eggs are there in 2.75 dozen?
33 eggs
400
Mixtures can be separated physically, while compounds can be separated chemically...how do you separate an element?
You can't!
400
What is the number before the "x 10n" called?
The mantissa
400
How many sig figs should be in the answer?
0.100 x 1001 = ?
3
500
Dissolving copper (II) chloride in water is classified as a physical or chemical change?
Physical!
500
How many seconds are there in 4.5 hours? Do some dimensional analysis!
16,200 seconds
500
60 g
500
Where can you find the percent error equation?
Table T
500
What is the answer to the following (to the correct number of sig figs)?
1.01 g + 2.2 g = ?
3.2 g (MUST SAY GRAMS AS THE UNITS)