Chem 104 Exam 2 Final Paper Verified Questions Accurate Solutions

CHEM 104 EXAM 2 FINAL PAPER VERIFIED QUESTIONS ACCURATE SOLUTIONS
CHEM 104 EXAM 2 Actual TEST 2026/2027
Complete Responses Verified A Questions and
Answers Verified Solutions Latest Update

Question:
Hydrogen fluoride will react with glass (silicon dioxide, SiO2) according to the equation below.
What mass of HF is required to react completely with 16.0 g of glass? [Molar masses: Si, 28.09
g/mol; F, 19.00 g/mol; H, 1.01 g/mol; O, 16.00 g/mol] 4HF(g) + SiO2(s) → SiF4(g) + 2H2O(g)

Answer:
21.3 g



Question:
Two molecules of ethane experience what type of attractive forces?

Answer:
London forces



Question:
A solution contains the label 0.2 M KNO3. What is the correct interpretation of this concentration?

Answer:
There are 0.2 moles of KNO3 in 1 L of solution.



Question:
Which properly represents the Lewis structure of hydrogen sulfide, H2S?

Answer:

,Question:
If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of
the solution? [Molecular weight: HCl, 36.46 amu]

Answer:
0.0475 M



Question:
A patient needs 0.300 g of a solid drug preparation per day. How many 10.0 mg tablets must be
given to the patient per day?

Answer:
30.0 tablets



Question:
What term is used to describe atoms of the same element that have different masses?

Answer:
isotopes



Question:
Classify the following reaction: H2SO4(aq) + 2KOH(aq) → K2SO4(aq) + 2H2O(aq)

Answer:
acid - base



Question:
Which of the following statements correctly describes Charles's Law?

Answer:
The volume of a gas is directly proportional to the Kelvin temperature of the gas, if the pressure and
amount of gas remain constant.

,Question:
Which statement concerning the elements fluorine, chlorine, bromine, and iodine is FALSE?

Answer:
They all have the same electron configuration.



Question:
Choose the best classification of the reaction represented by the following equation: MgO(s) +
CO2(g) → MgCO3(s)

Answer:
combination



Question:
In what region on the periodic table are elements with the lowest electronegativity values found?

Answer:
bottom left corner



Question:
The modern periodic law states that the physical and chemical properties of the elements are
periodic functions of what property?

Answer:
atomic number



Question:
Tungsten is a metal containing 74 protons, and is used widely in the electronics industry. What is the
chemical symbol for tungsten?

Answer:
W

, Question:
What kind of bonding exists in substances that consist of discrete molecules?

Answer:
covalent



Question:
What is the mass of 4.35 moles of aluminum?

Answer:
117 g



Question:
Emergency treatment of cardiac arrest victims sometimes involves injection of a calcium chloride
(CaCl2) solution directly into the heart muscle. Which statement about the compound CaCl2 is
FALSE?

Answer:
The anion in this compound is Cl2-.



Question:
What is the mass of 3.01 mol of sulfur atoms?

Answer:
96.5 g



Question:
What is the mass of a 0.150 mole sample of sulfur?

Answer:
4.81g