WorksheetsAp chemistry Unit1
Total questions: 17
Worksheet time: 23mins
Mass spectroscopy graphs measure ______________
boiling points of hydrocarbons
ionization energies of electrons
atomic masses of isotopes
numbers of electrons in each sublevel
Isotopes of an element have the same number of _______, but different numbers of _________.
neutrons
protons
protons
neutrons
protons
electrons
electrons
protons
2) What is the physical state in which matter has no specific shape but does have a specific volume?
A) gas
B) solid
C) liquid
D) salts
E) ice
4) A combination of sand, salt, and water is an example of a __________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid
5) A small amount of salt dissolved in water is an example of a __________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid
9) Which one of the following is a pure substance?
A) concrete
B) wood
C) salt water
D) elemental copper
E) milk
10) Which one of the following is often easily separated into its components by simple techniques such as filtering or decanting?
A) heterogeneous mixture
B) compounds
C) homogeneous mixture
D) elements
E) solutions
11) Which states of matter are significantly compressible?
A) gases only
B) liquids only
C) solids only
D) liquids and gases
E) solids and liquids
13) If matter is uniform throughout and cannot be separated into other substances by physical means, it is __________.
A) a compound
B) either an element or a compound
C) a homogeneous mixture
D) a heterogeneous mixture
E) an element
14) An element cannot __________.
A) be part of a heterogeneous mixture
B) be part of a homogeneous mixture
C) be separated into other substances by chemical means
D) interact with other elements to form compounds
E) be a pure substance
16) The law of constant composition says __________.
A) that the composition of a compound is always the same
B) that all substances have the same composition
C) that the composition of an element is always the same
D) that the composition of a homogeneous mixture is always the same
E) that the composition of a heterogeneous mixture is always the same
17) Which of the following is an illustration of the law of constant composition?
A) Water boils at 100°C at 1 atm pressure.
B) Water is 11% hydrogen and 89% oxygen by mass.
C) Water can be separated into other substances by a chemical process.
D) Water and salt have different boiling points.
E) Water is a compound.
9.The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take __________ days to travel between the Earth and Moon.
A) 0.60
B) 1.7
C) 3.9
D) 7.3
E) 5.6
0.056
What percentage of the total atomic mass of carbon monoxide (CO) is composed of carbon?
29%
43%
57%
73%
What percentage of the total atomic mass of carbon monoxide (CO) is composed of oxygen?
29%
43%
57%
73%
What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of bromine? Hint - consider the mass of both atoms of bromine in your calculation.
13%
43%
63%
87%
