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CHEM 120 Quiz 3 (Version 2), CHEM 120: Introduction to General, Organic & Biological Chemistry with Lab, Verified and Correct Answers, Chamberlain College of Nursing.$7.99
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CHEM 120 Quiz 3 (Version 2), CHEM 120: Introduction to General, Organic & Biological Chemistry with Lab, Verified and Correct Answers, Chamberlain College of Nursing.
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CHEM 120, Chamberlain College of Nursing
Institution
CHEM 120, Chamberlain College Of Nursing
CHEM 120 Quiz 3 (Version 2), CHEM 120: Introduction to General, Organic & Biological Chemistry with Lab, Verified and Correct Answers, Chamberlain College of Nursing.
CHEM 120 Week 3 Quiz 3
1. Question :
(TCO 5) A reaction that releases energy as it occurs is classified as a(n) _____.
Student Answer: catalyzed reaction
CORRECT exothermic reaction
decomposition reaction
endothermic reaction
oxidation-reduction reaction
Instructor Explanation: See the Week 3 Lecture. Reactions that release
energy are exothermic.
Points Received: 5 of 5
Comments:
Question 2. Question :
(TCO 5) Which coefficient is placed in front of O2 to complete the balancing of the
following equation?
C5H8 + ? O2 --> 5 CO2 + 4 H2O
Student Answer: 1
INCORRECT 3
5
6
CORRECT 7
Instructor Explanation: See Chapter 5. There are 14 oxygen atoms on the
product side of the equation: 10 from the five CO2 and four from the four H2O.
Therefore, seven O2 molecules are required on the reactant side to balance the
equation.
Points Received: 0 of 5
Comments:
Question 3. Question :
(TCO 5) Magnesium reacts with oxygen to form magnesium oxide and has the
following balanced chemical equation: 2 Mg + O2 --> 2 MgO.
How many mole(s) of MgO are produced when 0.40 mole O2 reacts completely?
Student Answer: 0.20 mole
INCORRECT 0.40 mole
0.60 mole
0.10 mole
CORRECT 0.80 mole
Instructor Explanation: See Chapter 5. From the balanced chemical
equation, we know that 2 moles of MgO are produced from 1.0 mole of O2.
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