AnswersS1S Chemistry B E4912 - AGNuclear Energy

Nuclear Energy — Cumulative exam Answers

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Consider the hydrocarbon below.Which of these is a trans- isomer of the above hydrocarbon?

Question illustration
A
A skeletal model with a 6 carbon chain, with a double bond between the second and third carbon.
Option A
B
A skeletal model with line segments that slant up, run flat in a double bond, slant down, run flat, and slant down again.
Option B
C
A skeletal model of a 5 carbon chain with a double bond between the first and second carbons.
Option C
D
A skeletal model with line segments that slant up, fun flat in a double bond, slant up, and run flat.
Option D
22
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Four different solutions (I, II, III, and IV) are labeled on the pH scale below.Why would solution IV be considered the most concentrated base out of the four substances?

Question illustration
A
It has the highest concentration of hydrogen ions.
B
It has the highest concentration of hydronium ions.
C
It has the highest concentration of oxide ions.
D
It has the highest concentration of hydroxide ions.
23

Which of the following is the last step in performing a titration?

A
finding out which pH indicator works
B
determining the concentration of an unknown base
C
finding the number of moles of product produced in a reaction
D
determining the molecular masses of the products in the reaction
24

Consider the reaction below. Which half reaction correctly describes the oxidation that is taking place?

Question illustration
A
Z n (s) right arrow upper Z n superscript 2 plus (a q) plus e superscript minus.
Option A
B
Upper Z n (s) right arrow upper Z n superscript 2 plus (a q) plus 2 e superscript minus.
Option B
C
Upper C u superscript 2 plus (a q) plus 2 e superscript minus right arrow upper C u (s).
Option C
D
Upper C u superscript 2 plus (a q) plus e superscript minus right arrow upper C u (s).
Option D
25

Hydrogen fuel cells that operate at lower temperatures use more expensive platinum electrode catalysts. What helps to make up for the higher-cost electrodes?

A
They use a cheaper fuel.
B
They operate at a higher efficiency.
C
They use a reaction that is not redox.
D
They produce fewer emissions.

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