CHEM 130 exam questions and correct
detailed answers
Which of the following metric relationships is incorrect?
1 microliter= 10e-6
1 gram= 10e3 kilograms
10e3 milliliters= 1 liter
gram= 10e2 centigrams - correct answers 1 gram= 10e3 kilograms
What is the measure of resistance an object has to a change in its state of motion?
mass
weight
volume
length - correct answers mass
Express the number 0.0610 in scientific notation
6.1x10e-2
61.0x10e-3
610x10e-4
6.10x10e-2
0.610x10e-1 - correct answers 6.10x10e-2
You measure water in two containers: a 10-mL cylimer with marks at every mL, and 1-mL pipet marked
at every 0.1mL. If you have some water in each of the containers and add them together, to what
DECIMAL PLACE could you report the total volume of water?
0.01 mL
0.1 mL
,1 mL
10 mL - correct answers 0.1 mL
Consider the numbers 23.68 and 4.12. The sum of these numbers has ___ significant figures, and the
product of these numbers has ___ significant figures.
3,3
4,4
3,4
4,3 - correct answers 4,3
417 Kelvin equals....
144 degrees F
273 degrees F
690 degrees C
690 degrees F
144 degrees C - correct answers 144 degrees C
Express the volume 329.0 cm^3 in liters.
329.0 L
32.90 L
3.290 L
0.3290 L
0.03290 L - correct answers 0.3290 L
A total of 35.0 mL of gasoline has a mass of 24.6 grams. At room temperature, when the gasoline is
added to water (density 1 gram/mL):
it will float on top
it will sink to the bottom
it will mix so, you can't see it
, it would depend upon the rate of addition - correct answers it will float on top
The boiling point of water is..
both a physical and chemical change
a chemical change because heat is needed for the process to occur
a chemical change because a gas (steam) is given off
a physical change because the water merely disappears
a physical change because the gaseous water is chemically the same as the liquid - correct answers a
physical change because the gaseous water is chemically the same as the liquid
Which separation technique is based on differences in the volatility of the substances to be separated?
filtration
solvent extraction
distillation
paper chromatography - correct answers distillation
The state of matter for an object that has definite volume and indefinite shape is...
solid state
liquid state
gaseous state
mixed state - correct answers liquid state
In the spring of 2008, petrol cost 1.049 per liter in London. ON the same day, the exchange rate was 1
dollar=0.503. What was the price of London petrol in dollars per gallon? (1 gal= 3.7854 L)
7.89/gal
2.00/gal
3.97/gal
1.82/gal
7.53/gal - correct answers 7.89/gal
detailed answers
Which of the following metric relationships is incorrect?
1 microliter= 10e-6
1 gram= 10e3 kilograms
10e3 milliliters= 1 liter
gram= 10e2 centigrams - correct answers 1 gram= 10e3 kilograms
What is the measure of resistance an object has to a change in its state of motion?
mass
weight
volume
length - correct answers mass
Express the number 0.0610 in scientific notation
6.1x10e-2
61.0x10e-3
610x10e-4
6.10x10e-2
0.610x10e-1 - correct answers 6.10x10e-2
You measure water in two containers: a 10-mL cylimer with marks at every mL, and 1-mL pipet marked
at every 0.1mL. If you have some water in each of the containers and add them together, to what
DECIMAL PLACE could you report the total volume of water?
0.01 mL
0.1 mL
,1 mL
10 mL - correct answers 0.1 mL
Consider the numbers 23.68 and 4.12. The sum of these numbers has ___ significant figures, and the
product of these numbers has ___ significant figures.
3,3
4,4
3,4
4,3 - correct answers 4,3
417 Kelvin equals....
144 degrees F
273 degrees F
690 degrees C
690 degrees F
144 degrees C - correct answers 144 degrees C
Express the volume 329.0 cm^3 in liters.
329.0 L
32.90 L
3.290 L
0.3290 L
0.03290 L - correct answers 0.3290 L
A total of 35.0 mL of gasoline has a mass of 24.6 grams. At room temperature, when the gasoline is
added to water (density 1 gram/mL):
it will float on top
it will sink to the bottom
it will mix so, you can't see it
, it would depend upon the rate of addition - correct answers it will float on top
The boiling point of water is..
both a physical and chemical change
a chemical change because heat is needed for the process to occur
a chemical change because a gas (steam) is given off
a physical change because the water merely disappears
a physical change because the gaseous water is chemically the same as the liquid - correct answers a
physical change because the gaseous water is chemically the same as the liquid
Which separation technique is based on differences in the volatility of the substances to be separated?
filtration
solvent extraction
distillation
paper chromatography - correct answers distillation
The state of matter for an object that has definite volume and indefinite shape is...
solid state
liquid state
gaseous state
mixed state - correct answers liquid state
In the spring of 2008, petrol cost 1.049 per liter in London. ON the same day, the exchange rate was 1
dollar=0.503. What was the price of London petrol in dollars per gallon? (1 gal= 3.7854 L)
7.89/gal
2.00/gal
3.97/gal
1.82/gal
7.53/gal - correct answers 7.89/gal
