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Fresh Grad Lands Job as Real Estate Agent With Help from Professional Writers

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Manush’s story shows the importance of using powerful keywords to his resume in landing the job he wanted.

Exam 2

Navigation   » List of Schools  »  Moonpark College  »  Chemistry  »  Chem R110 – Elementary Chemistry  »  Spring 2021  »  Exam 2

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Below are the questions for the exam with the choices of answers:

Question #1
What are the coefficients for the following reaction when it is properly balanced?

___nitric acid + ___sodium hydroxide → ___sodium nitrate + ___water

A  1HNO3 + 2NaOH⟶ 1NaNO3+ 2H2O
B  1HNO3 + 1NaOH⟶ 1NaNO3+ 1H2O
C  2HNO3 + 2NaOH⟶ 2NaNO3+ 2H2O
D  2HNO3 + 1NaOH⟶ 2NaNO3+ 1H2O
Question #2
The following reaction: C + O2 → CO2, is an example of
A  combination.
B  single-displacement.
C  double-displacement.
D  decomposition.
Question #3
H2S is called
A  hydrosulfuric acid.
B  sulfuric acid.
C  hydrogen sulfite.
D  dihydrogen sulfuric acid.
Question #4
What is the molecular formula of a compound with the empirical formula CH2O and molar mass of 180.18g?
A  CH2O
B  C4H8O4
C  C6H12O6
D  C2H4O2
Question #5
PbO2 is known as
A  lead(II) oxide.
B  lead(IV) oxide.
C  lead oxide.
D  lead dioxide.
Question #6
How many molecules are present in 0.500 mol of CH4?
A  6.02 x 1023 molecules
B  5.00 x 1022 molecules
C  8.00 x 1023 molecules
D  3.01 x 1023 molecules
Question #7
What is the empirical formula of a substance that consists of 3.704g aluminum and 3.295g oxygen?
A  AlO2
B  Al3O2
C  AlO
D  Al2O3
Question #8
A fictional element has two isotopes and an atomic mass of 87.08 amu. If the first isotope is 86 amu and the second isotope has a mass of 90 amu. Which isotope has the greatest natural abundance?
A  Not enough information provided.
B  90 amu
C  None of these
D  86 amu
E  There are equal amounts.
Question #9
How many moles of magnesium ions are present in 1.64 g of MgSO4?
A  0.0136 mol
B  120. mol
C  0.734 mol
D  1.64 mol
Question #10
When an atom gains an electron, the resulting particle is called:
A  None of these
B  an isotope.
C  a proton.
D  an anion.
E  a cation.
Question #11
As the distance between two particles with charges that repel each other increases, the force of repulsion will ___.
A  decrease
B  increase
C  remain the same
Question #12
Which of the following exist in its natural state as a diatomic?
A  helium
B  boron
C  radium
D  iodine
Question #13
Ions can be formed from atoms by losing or gaining electrons. Select the alternative that states the correct number of protons, neutrons, and electrons in .
A  10 protons, 17 neutrons, 13 electrons
B  13 protons, 14 neutrons, and 10 electrons
C  13 protons, 27 neutrons, 10 electrons
D  13 protons, 14 neutrons, and 16 electrons
Question #14
When the equation __Ca3N2 + __H2O → __Ca(OH)2 + __NH3 is balanced, the coefficient of H2O is:
A  12
B  2
C  3
D  6
E  None of these
Question #15
What is the percent by mass of hydrogen in HC2H3O2?
A  5.05%
B  1.68%
C  53.30%
D  6.73%
Question #16
How many protons are in a neutral atom of Ar-40?
A  22
B  18
C  40
D  58
Question #17
Which is a spectator ion from the following complete ionic equation: H+(aq) + Br-(aq) + K+ (aq) + OH-(aq) → H2O(l) + K+(aq) + Br- (aq)
A  H2O
B  None of these
C  H+
D  OH-
E  K+
Question #18
The atomic mass unit is defined as:
A  the mass of electrons found in a carbon atom containing six protons and neutrons.
B  the mass of the hydrogen atom containing only one proton.
C  1/14 the mass of a nitrogen atom containing 7 protons and 7 neutrons.
D  1/12 the mass of a carbon atom containing six protons and six neutrons.
E  None of these
Question #19
Which of the following is the formula for carbon tetrachloride?
A  CCl
B  CCl2
C  CCl4
D  CCl3
Question #20
Which of the following compounds is INSOLUBLE?
A  lithium carbonate
B  potassium acetate
C  magnesium bromide
D  None of these
E  aluminum sulfide
Question #21
What is the value of n when the empirical formula is C3H5 and the molecular mass is ?
A  10
B  140
C  None of these
D  0.02
E  5
Question #22
What is the formula of calcium nitrate?
A  Ca(NO2)2
B  Ca(NO2)3
C  Ca(NO3)2
D  Ca3N2
Question #23
Which subatomic particle is located outside the nucleus of the atom?
A  proton
B  neutron
C  electron
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“Kudos to the team for a job well done.  I am sincerely appreciative of the time and effort you gave on my resume.  You did not only help me land the job I had always been dreaming of but you also made me realize how important adding those specific keywords to my resume!  Cheers!

Manush
Fresh Graduate
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