Chem. Unit 1 complete
centi-
prefix meaning 1/100
milli-
prefix meaning 1/1000
kilo-
prefix measuring 1000
± value
uncertainty value of measurement
Express as ordinary numbers. 8.97 x 10^-3=
0.00897
Round 0.0645 g to 2 significant figures:
0.065
1,000 milliliters is the same as:
1 L
Express in scientific notation. Choose the answer with the proper number of significant figures. _____ 20. x 10^26 10 x 10^26 2 x 10^27
2 x 10^27
Express in scientific notation. Choose the answer with the proper number of significant figures.
2 x 10^8
Express in scientific notation. Choose the answer with the proper number of significant figures.
2.0 x 10^8
2.1 liters is the same as: ______ cm3 and ______ mL
2100 2100
Round 23.455 cm to 4 significant figures:
23.46
3 x 100e0 =
3
Give the number of significant figures: 13,436.0 mm
6
Give the number of significant figures: 369,132,000 sec
6
Express as ordinary numbers. 6.02 x 10^9 =
6,020,000,000
How many milliliters are in a cubic meter? How many liters is this?
8,000mL 8L
Express in scientific notation. Choose the answer with the proper number of significant figures. (2.4 x 10^-9) (4.0 x 10^23) =
9.6 x 10^14
Weight is a measurement of:
Force
Which of the following is not equal to 0.536 kilometer? 53.6 hectometers (hm) 536 meters (m) 536,000 millimeters (mm) 53,600 centimeters (cm)
53.6 hectometers (hm)
Round 6.362 cg to 3 significant figures:
6.36
Express in scientific notation. Choose the answer with the proper number of significant figures. 69,000,000,000 = _____ 69 x 10^9 6.9 x 10^10 6.9^10
6.9 x 10^10
Which of these is an appropriate instrument to measure mass?
Balance.
Accuracy-
Correctness of a measurement.
Precision-
Degree of exactness of a measurement.
The mass of 1 gram:
Equals the mass of 1 mL of water at 4 degrees celcius.
Weight and mass are essentially the same measurements.
FALSE
The three aspects of the measuring process are units, systems, and instruments.
False
Pick the TWO true statements from the following: Graduated cylinders are used to measure volume. All graduated cylinders measure liquids with the same precision. Graduated cylinders are the only instruments used to measure volume in the laboratory. Always read a graduated cylinder from the bottom of the meniscus.
Graduated cylinders are used to measure volume. Always read a graduated cylinder from the bottom of the meniscus.
Density is a measure of what?
How much mass per unit of volume is in a substance
Balance-
Instrument to measure mass.
Graduated Cylinder-
Instrument to measure volume.
+ value-
Uncertainty value of measurement.
meter
base unit of distance
kilogram
base unit of mass
liter
base unit of volume
Which is not a measurement of volume?
cm
accuracy
correctness of a measurement
precision
degree of exactness of a measurement
balance
instrument to measure mass
graduated cylinder
instrument to measure volume
Which of these is the basic unit of mass?
kg
The measure of distance from one point to another is:
length
The primary unit of length in the metric system is the:
meter
Round 0.0952 km to 2 significant figures:
0.095
100 grams is the same as ______ kg and ______ cg.
0.100 10,000
Multiply and round to the proper number of significant figures. (0.234 cm)(3.53 cm) =
0.826
Express in scientific notation. Choose the answer with the proper number of significant figures. (3 x 104) (4 x 1023) = _____ 12^27 12 x 10^27 10 x 10^27 1 x 10^28
1 x 10^28
Kilo-
1,000
kilo-
1,000
kilo-
1,000 times the base unit
mega-
1,000,000 times the base unit
Express in scientific notation. Choose the answer with the proper number of significant figures. _____ 0.47 x 10-17 0.5 x 10-17 5 x 10-18
5 x 10^-18
Express in scientific notation. Remember, M must be a number 1 ≤ M < 10. 0.000543 =
5.43 x 10^-4
Express as ordinary numbers. 3 x 10^0 =
3
Give the number of significant figures: 0.882 mm
3
Give the number of significant figures: 3.10 cm
3
Give the number of significant figures: 6.32 g
3
Give the number of significant figures: 832,000 km
3
3.45 kilometers = _______ micrometer(s)
3,450,000,000
Express in scientific notation. Remember, M must be a number 1 ≤ M < 10. 32,400 =
3.24 x 10^4
Express in scientific notation. Remember, M must be a number such that 1 ≤ M < 10. 32,400 = _____
3.24*10e4
Express as ordinary numbers. 3.4 x 10^4 =
34,000
Give the number of significant figures in this number: 40.00
4
Give the number of significant figures: 0.01101 cm
4
Give the number of significant figures: 7.110 g
4
Give the number of significant figures: 92.06 kg
4
How many significant figures should the following answer have? (23.34 cm)(90076 cm)(2.1223 cm) = _____
4
Express in scientific notation. Remember, M must be a number such that 1 ≤ M < 10. 0.000543 = _____
5.43*10e-4
Which of the following is not the same as 12.5 millimeters? 0.0000125 km 0.00125 hm 0.0125 m 1.25 cm
0.00125 hm
Which of the following is not equal to 120 centimeters? 0.0012 kilometer (km) 0.012 dekameter (dkm) 1.2 meters (m) 1,200 millimeters (mm)
0.012 dekameter (dkm)
Which of the following is not the same as 1.69 meters? 0.0169 km 0.169 dkm 169 cm 1,690 mm
0.0169 km
0.00105 liters is the same as: _______ cm3 and _______ mL
1.05 1.05
Express in scientific notation. Remember, M must be a number 1 ≤ M < 10. 0.00000000000013 =
1.3 x 10^-13
Express in scientific notation. Remember, M must be a number such that 1 ≤ M < 10. 0.00000000000013 = _____
1.3*10e-13
Which of the following is not the same as 1,400 mL? 1,400 cm³ 1.4 L 1.4 cm³ 140 cL
1.4 cm³
Express in scientific notation. Remember, M must be a number 1 ≤ M < 10. 18 =
1.8 x 10^1
milli-
1/1,000
milli-
1/1,000 of the base unit
micro-
1/1,000,000 of the base unit
nano-
1/1,000,000,000 of the base unit
Centi-
1/100
centi-
1/100 of the base unit
Milli-
1/1000
How many millimeters are there in 1 centimeter?
10
Which one of the following is not equal to 100 meters? 0.100 kilometer 10 hectometers 10,000 centimeters 100,000 millimeters
10 hectometers
Which of the following is not equal to 0.1 centimeter? 0.000001 kilometer (km) 0.001 meter (m) 10 millimeters (mm) 1,000 micrometers (µm)
10 millimeters (mm)
Multiply and round to the proper number of significant figures. (896.5 cm)(12 cm) =
11,000
Give the number of significant figures in this number: 0.070
2
Give the number of significant figures: 0.011 cm
2
A persons weight changes as he travels from earth to space, but his mass stays the same.
TRUE
Define volume:
The space occupied by mass.
0.00001011 kilograms is a larger mass than 0.001011 grams.
True
54,000,000 nanometers = 0.000000054 megameter
True
Accuracy is the correctness of a measurement.
True
Precision is related to the uncertainty in a measurement.
True
Scientific notation is used to keep track of very small and very large numbers during mathematical calculations. True False
True
The United States is one of the few countries in the world which has not yet adopted the metric system for general use.
True
The metric system is also called the SI system.
True
Volume is the space occupied by a quantity of matter.
True
