Chemistry B Final Exam, please do give the correct answers to check my work other ways I dislike you. 1. Given the gener

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Chemistry B Final Exam, please do give the correct answers to
check my work other ways I dislike you.
1. Given the general trend with bond energies, which of the
compounds would have the smallest bond energy?

2. Based on the differences in electronegativities, with which atom
is francium (Fr) most likely to form an ionic bond?
3. Which statement is the best description of the energy found in
molecules of water?
4. When potassium permanganate and glycerol react, the potential
energy of the products is less than the potential energy of the
reactants. Which statement about this reaction is correct?
5.Hydrochloric acid and sodium hydroxide react to produce water and
sodium chloride in an endothermic reaction. Which statement must be
true of the reaction?(1 point)
6. Imagine a graph. The x-axis is labeled "Time" and is measured in
seconds, and the y-axis is labeled "Potential Energy" and is
measured in kilojoules. The slope starts at 0 seconds with a
plateau at 25 kJ. This plateau is labeled "Reactants." The slope
then rises to a peak labeled "Activation Energy" at 78 kJ. Finally
the slope drops to a plateau at 14 kJ and is labeled
"Products."

What does the graph described above represent?
7.Endothermic reactions absorb a lot of energy. Exothermic
reactions give off a lot of energy. Which type of reaction has a
higher activation energy? Which one takes more energy to break up
the bonds of the reactants?
8.Why is thermal energy (heat) required to freeze ice into
crystals?(1 point)
9. Cobalt ions form complex ions with water and chloride as shown
in the reaction. The left side of the reaction is pink, and the
right side of the reaction is blue.

Co(H2O)62+ + 4Cl– + heat ⇄ CoCl42–+ 6H2O

Which statement about the system at equilibrium is correct?

10.Why are rubber and metal both useful while making wire?(1
point)
11.A pharmaceutical company wants to extract an ingredient from
pomace supplied by a certain food processing plant. Which process
is the most efficient with the lowest environmental impact?
12.Which option is a modern reason for optimizing the mining
process?(1 point)
13.Use the reaction to answer the question.

Fe2O3 + 3H2SO4

How many atoms of oxygen will be found in the product(s) of the
reaction?

14.Use the table and equation to answer the question.

Element Atomic Mass (amu)
hydrogen 1
carbon 12
oxygen 16
CH4 + 2 O2 → CO2 + 2 H2O

The law of conservation of matter states that matter cannot be
created nor destroyed. How does the balance equation above
demonstrate this law?
15.Elements A and B react according to the following balanced
equation.

3A2 + 2B → 2A3B

The molar mass of element A is 4 g/mol. The molar mass of element B
is 16 g/mol. When the initial mass of element A is 48 grams, which
mass of element B should be present?
16.Use the table of molar masses to answer the question.

Element Molar Mass (g/mol)
silicon 28.09
oxygen 16.00
How many molecules of silicon dioxide (SiO2) are there in a 15-gram
sample?

17.Which statement about the number of protons and neutrons in a
nuclear change is correct?
18. Which statement accurately describes nuclear fission? (1
point)
19. A nucleus decays to produce a nucleus with one additional
proton. Which type of decay did the nucleus undergo?
20. Which type of decay is a form of nuclear fission?(1
point)
21.Why do some atmospheric gases act as greenhouse gases, while
others do not?(1 point)
22. Which option correctly identifies a cause and consequence of
water pollution?(1 point)
23.Which outcome is the most likely result of eutrophication of a
waterway?(1 point)
24.Despite fracking being a controversial process in the fuel
industry, it is still used today. Why?