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ACS CHEMISTRY GENERAL EXAM 2024 ACTUAL EXAM 2 VERSIONS (VERSION A AND B) COMPLETE 400 QUESTIONS WITH DETAILED VERIFIED ANSWERS /ALREADY GRADED A+$18.99
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ACS CHEMISTRY GENERAL EXAM
2024 ACTUAL EXAM 2 VERSIONS
(VERSION A AND B) COMPLETE 400
QUESTIONS WITH DETAILED
VERIFIED ANSWERS /ALREADY
GRADED A+
How many valence electrons are represented in the Lewis
electron-dot structure for SO2? - ....ANSWER...8
Molecules of which compounds violate the octet rule? -
....ANSWER...2 and 3
CH2Cl2 and XeF4
The boiling point of H2O, compared with the other
members of the series, can be explained by -
....ANSWER...dipole-induced dipole forces
,2|Page
The fact that Pt(NH3)2Cl2 exists in two different isomeric
forms offers evidence that the geometry is -
....ANSWER...tetrahedral
Which species has both covalent and ionic bonds? -
....ANSWER...H3O+
When the carbon-carbon bonds in ethane (C2H6), ethane
(C2H4), and benzene (C6H6) are arranged in order of
increasing length (shortest bonds first) what is the correct
order? - ....ANSWER...C2H4 < C6H6 < C2H6
These two electron-dot formulas for carbon dioxide both
satisfy the octet rule, but one is preferred over the other.
Which of the statements identifies the preferred structure
and also the reason it is preferred? -
....ANSWER...Structure 2 is preferred because the formal
charge on each atom is zero
Which element is most likely to form a triple bond? -
....ANSWER...N
Which is an isomer of H H H
H-C-O-C-C-H
H H H - ....ANSWER...H H H
,3|Page
H-C-C-C-O-H
HHH
How many sigma bonds and how many pi bonds are
represented in this structure? - ....ANSWER...6; 3
Sodium chloride, NaCl, crystallizes in a face-centered
cubic lattice of chloride ions, with the smaller sodium ions
occupying holes between the chloride ions. How many Cl-
ions are in contact with any single Na+ ion? -
....ANSWER...6
Resonance structures describe molecules that have -
....ANSWER...multiple electron-dot formulas
The complete Lewis structure of O
C
Cl Cl
will have - ....ANSWER...at least one double bond
What is the empirical formula for the substance with this
analysis?
Na 54%
8.50%
, 4|Page
O 37.5% - ....ANSWER...Na3BO3
What is the mass percent of oxygen in Fe2(SO4)3?
Fe 55.85 g*mol-1
S 32.06 g*mol-1
O 16.00 g*mol-1 - ....ANSWER...48.1%
A typical silicon chip, such as those in electronic
calculators, has a mass of 2.3 x 10^-4. Assuming the chip
is pure silicon, how many silicon atoms are in such a chip?
- ....ANSWER...2.3 X 10^-4 g x 1 mol Si/28 g Si x 6.02 X
10^23/1 mol Si = 4.9 x 10^18 atoms Si
What is the equation to find the Freezing point
Depression? What is i and its two rules?
and what is the Kf(Constant) for water? -
....ANSWER...delta T (freezing point)=m(molality) * Kf *
i
water Kf=1.86*C/molal
Van't Hoff Factor (i) :how much particle dissolves
-ionic compounds separate in solution --depending how
many ions they have
-molecular compounds don't separate at all
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