Chem 1010 - General Chemistry 1 » Fall 2021 » Quiz 1

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Question #1
Which of the following is not a symbol for an element?
A.   Ca
B.   Cr
C.   CO
D.   Cd
Question #2
What is the mass in grams of 5.26x1024 magnesium atoms?
A.   212
B.   2.12x1048
C.   359
D.   3.59x10-1
Question #3
Perform the following calculation and report your answer to the correct number of significant figures.
A.   73
B.   7.27x105
C.   7.3x105
D.   7.27
Question #4
How many mm2 are in 39.8 cm2 ?
A.   3.98x103
B.   3.98x10-1
C.   398
D.   3.9
Question #5
Which of the following is true about a gas in a sealed container?
A.   The gas does not have density.
B.   It assumes the shape and the volume of the container.
C.   It assumes the shape of the container but doesn’t change its volume to that of the container.
D.   If the container is opened, the gas will not flow from it.
Question #6
Which of the following is correct?
A.   81Br has 35 protons, 35 electrons, and 81 neutrons.
B.   59Co2+ has 27 protons, 25 electrons, and 32 neutrons.
C.   16O2- has 16 protons, 14 neutrons, and 18 electrons.
D.     34S2- has 16 protons, 16 neutrons, and 18 electrons
Question #7
Which of the following concerning atoms is false?
A.   The mass of a proton and electron are about the same
B.   In an atom, electrons are found outside of the nucleus.
C.   A nucleus of an atom can contain protons and neutrons.
D.   The mass of a proton and neutron are about the same
Question #8
If 79.5 g of a metal that has a density of 3.65 g/mL is placed in 55.0 mL of water, what is the final volume?
A.   134 mL
B.   58.7 mL
C.   21.8 mL
D.   76.8 mL
Question #9
Which of the following is the best definition of a compound?
A.   Any two elements from the periodic table that are chemically bonded.
B.   Two or more different elements from the periodic table that are chemically bonded.
C.   Two or more nonmetals from the periodic table that are chemically bonded.
D.   Two or more of the same element from the periodic table that are chemically bonded.
Question #10
How many significant figures are in 4.310x103 ?
A.   2
B.   7
C.   3
D.   4
Question #11
Metal corroding is a _______________ change?
A.   chemical
B.   physical
C.   gaseous
Question #12
How many neutrons are in 23Na+ ?
A.   12
B.   23
C.   11
D.   22

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