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WorksheetsChem II Chapter 1 Test
Total questions: 24
Worksheet time: 6hrs 0mins
How many significant figures are in the number .00340
2
3
4
5
The dimensions of a rectangular solid are 8 cm long, 4.00 cm wide, and 2 cm high. If the density is 10.0 g/cm, what is its mass
10/64 g
10.00
64.0
640
a metal sample weighing 30.9232 grams was added to a graduated cylinder containing 23.26 mL of water. The volume of water plus the sample was 24.85 mL. Which setup will result in the density of this metal.
30.9232 * (24.85-23.26)
30.9232/(24.85- 23.26)
30.9232 * (24.85/23.26)
20.9232/ (24.85+23.26)
A box measures 3.50 cm * 2.915 cm. The product of these numbers = 10.2025 cm^2
what is the proper way to report the area of the box?
10.20 cm^2
10.2 cm^2
10 cm^2
10. cm^2
The result of 2.350 * (4.0 + 6.311) when reported to the correct significant figures is...
24
24.2
24.21
24.205
A student does a calculation using her calculator and the number 280.27163 is shown on the display. If there are actually three sig figs, how should she show the final answer.
280
280.3
2.80 x 10^-2
2.80 x 10^2
The term that refers to reproducibility of a laboratory measurement is...
accuracy
precision
exactness
repeatability
which measurement below is NOT written with three significant digits?
2.00 cm
550. g
.003 L
12.7 mm
The number 6.33 * 10^2
6.33
.633
633
.0633
All of the following are characteristic properties of phosphorus. Which one is a chemical property?
Both red phosphorus and white exist in solid allotropic forms
the red form melts at about 600 degrees C an the white form melts at 44 degrees C
The white form is soluble in liquid carbon disulfide, but is insoluble in water
when exposed to air, white will burn spontaneously, but red will not.
Classify as a chemical or physical property.
bubbles form on a piece of metal when it is dropped into acid
Chemical
Physical
Classify as a chemical or physical property.
the color of a crystalline substance is yellow
Chemical
Physical
Classify as a chemical or physical property.
a shiny metal melts at 650 degrees Celsius
Chemical
Physical
Classify as a chemical or physical property.
the density of a solution is 1.84 g/cm
Chemical
Physical
When a pure substance was heated, a student obtained another solidi and a gas, each of which was a pure substance. From this information with of the following statements is always a correct conclusion?
the original solid is not an element
both products are elements
both products are compounds
the original solid is a compound and the gas is an element
the prefix "milli" corresponds to what multiplication factor?
10^-6
10^-3
10^3
10^6
How many grans does one kilogram contain?
10
100
1,000
10,000
Perform the following conversion:
6.00 m/s = ___ km/hr
.360
1.67
21.6
167
Water has a density of 1.0 g/mL. Which of the following objects will float in water?
object 1:
mass=50.0 g
volume=60.8 mL
object 2:
mass=65.2g
volume=42.1 mL
object 3:
mass=100g
volume=20.0 mL
object 4:
mass=120g
volume=36.7 mL
A graduated cylinder contains 20.0 mL of water. An irregular shaped object is placed in a cylinder, and the water level rises to the 31.2 mL mark. If the objects have a mass of 47.9g, what is the density?
2.14g/mL
4.28 g/mL
4.28 g/mL
1.00 g/mL
The density of copper is 8.92 g/mL. the mass of a piece of copper that has a volume of 10.0 mL is..
89.2 g
892 g
.892 g
8.9*10^2 g
Chromatography is a good way tp separate the
elements in a compound
the components in a mixture
the atoms in an element
the phases of a pure substance
A solution of sugar water may be defined as a
heterogeneous mixture
homogeneous mixture
heterogeneous compound
homogeneous compound
The measurement 4.3 *10^3 g could also be written as
4.3 pg
4.3 mg
4.3 kg
4.3 g
4.3 dg
