Chem 1010 - General Chemistry 1 » Fall 2021 » Chapter 2 Chemical Compounds (2)

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Question #1
Which of these statements is true about electrons?
A.   Electrons have the same mass as the proton.
B.   Electrons have a positive charge.
C.   Electrons are found in the region surrounding the nucleus.
D.   Electrons are found in the nucleus.
Question #2
Which one of these designations is appropriate for an atom of nitrogen that has seven protons and seven neutrons ?
A.   14N 7
B.   7N 14
C.   7N 7
D.   15N 7
Question #3
How many neutrons are in the nucleus of 29Si?
A.   29
B.   16
C.   14
D.   15
Question #4
The element Erbium, Er, has five abundant isotopes 164Er, 166Er, 167Er, 168Er, and 170Er. The difference among these five isotopes is the ______.
A.   number of atoms in one mole
B.   charge in each proton
C.   charge on each electron
D.   number of neutrons
E.   total charge
Question #5
What is the most common charge observed for the ion of selenium?
A.   -2
B.   -1
C.   -3
D.   1
Question #6
What is the correct name for CO32-?
A.   Carbonate
B.   Carbon trioxide
C.   Carbon oxide
D.   Carbonite
Question #7
What is the correct formula for potassium hydroxide?
A.   KHSO4
B.   KOH
C.   P(OH)3
D.   K(OH)2
Question #8
What is the name for the ionic compound CrBr3?
A.   Copper(III) bromide
B.   Chromium(III) bromide
C.   Chromium tribromide
D.   Chromium bromide
Question #9
Which compound will yield an aqueous solution that conducts electricity?
A.   SCl4
B.   Na3PO4
C.   C2H6O
D.   N2O4
Question #10
What is the molecular formula for phosphine?
A.   P2H4
B.   N2H4
C.   NH3
D.   PH3
Question #11
What is the correct name for SCl4 ?
A.   Selenium tetrachloride
B.   Sulfur chloride
C.   Sulfur tetrachloride
D.   Disulfur heptachloride
Question #12
What is the proper name for C8H18?
A.   Benzene
B.   Decane
C.   Octane
D.   Nonane
Question #13
How many atoms of chlorine are in 0.50 mol CaCl2?
A.   6.0×1023 atoms
B.   3.0×1023 atoms
C.   1.7×10-24 atoms
D.   2 atoms
Question #14
Convert 4.45 mol of ruthenium to grams of ruthenium.
A.   0.0440 g
B.   22.7 g
C.   449.76 g
D.   450 g
Question #15
A typical serving of fresh apple pie contains 208 mg of sodium. How many moles of sodium are contained in this amount of fresh apple pie?
A.   9.05 mol sodium
B.   4.78 × 10-3 mol sodium
C.   9.05 × 10-3 mol sodium
D.   4.78 × 103 mol sodium
Question #16
Calculate the formula percent of oxygen in C6H8O4.
A.   63.0 %
B.   50.0 %
C.   5.61 %
D.   44.4 %

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