HEM1 Study guides, Class notes & Summaries
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CHEM133 Week 11 Lesson 5 Quiz
- Exam (elaborations) • 17 pages • 2023
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1.	Question: When comparing Be2 and H2: 
2.	Question: Atoms that are sp2 hybridized form ____ pi bond(s). 
3.	Question: The hybridization of the nitrogen atom in the cation NH2+ is: 
4.	Question: Which one of the following molecules has an atom with an incomplete octet? 
5.	Question: Nitrous oxide (N2O) is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for nitrous oxide based on minimizing formal charge overall? 
6....
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Straighterline CHEM101 Final Exam Graded A+
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Mass Number - ANSWER-total number of neutrons and protons in an atom; # protons + # electrons 
 
p - ANSWER-Most nonmetallic elements are found in which block of the periodic table? 
 
Positive matter is concentrated in the central core - ANSWER-Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing that... 
 
Potassium - ANSWER-Plants use up copious amounts of which alkali metal, preventing most of it from being washed out to sea? 
 
2:1:1:2 - ANSWER-What is the r...
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CHEM133 Week 15 Lesson 7 Quiz
- Exam (elaborations) • 19 pages • 2023
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1.	Question: A sample of oxygen gas has a volume of 3.52 L at 27°C and 800.0 torr. How many oxygen molecules does it contain? 
2.	Question: Consider a sample of gas in a container on a comfortable spring day. The Celsius temperature suddenly doubles, and you transfer the gas to a container with twice the volume of the first container. If the original pressure was 12 atm, what is a good estimate for the new pressure? 
3.	Question: Gas A and gas B are combined in a flask at initial pressures of 1...
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CHEM133 Week 15 Lesson 7 Quiz (All Correct)
- Exam (elaborations) • 19 pages • 2023
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1.	Question: A sample of oxygen gas has a volume of 3.52 L at 27°C and 800.0 torr. How many oxygen molecules does it contain? 
2.	Question: Consider a sample of gas in a container on a comfortable spring day. The Celsius temperature suddenly doubles, and you transfer the gas to a container with twice the volume of the first container. If the original pressure was 12 atm, what is a good estimate for the new pressure? 
3.	Question: Gas A and gas B are combined in a flask at initial pressures of 1...
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CHEM133 Week 4 Lesson 2 Quiz
- Exam (elaborations) • 10 pages • 2023
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1.	Question: If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of 
2.	Question: What volume of 18 M sulfuric acid must be used to prepare 1.80 L of 0.215 M H2SO4? 
3.	Question: What is the molecular mass of Br2? 
4.	Question: What is the molar concentration of sulfate ions in a 0.150 M Na2SO4 solution? 
5.	Question: How many moles of hydrogen chloride are contained in a 52.6 g sample of this gas? 
6.	Question: 1.00 mole of O2 contains the same number ...
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CHEM101 Graded Exam 4 Topic 18: Organic Chemistry FALL 2023 (Straighterline)
- Exam (elaborations) • 13 pages • 2023
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Which species will have the greatest absolute entropy at 25°C? 
Select one: 
A. C4H10(g) 
B. H2O(l) 
C. C2H5OH(l) 
D. C2H2(g) 
E. Ne(g) 
Which is a statement of the second law of thermodynamics? 
Select one: 
A. The energy of the universe is constant. 
B. The energy of the universe is decreasing. 
C. The entropy of the universe is increasing. 
D. The enthalpy of the universe is constant. 
E. The entropy of the universe is constant. 
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Question 3 
Correct 
5.00 points out 
of 5.00 
Que...
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CHEM101 Graded Exam 2Topic 9: Energy Changes in Chemical Reactions FALL 2023 Straighterline
- Exam (elaborations) • 15 pages • 2023
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Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and 
potassium chloride when heated. 
KClO3(s) → KCl(s) + O2(g) [unbalanced] 
What mass of oxygen gas is formed if 26.4 g of potassium chlorate decomposes 
completely? 
Select one: 
A. 6.86 g 
B. 99.1 g 
C. 4.60 g 
D. 10.3 g 
E. 223 g 
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Question 2 
Correct 
5.00 points out 
of 5.00 
Question 3 
Correct 
5.00 points out 
of 5.00 
Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor as ...
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CHEM133 Week 11 Lesson 5 Quiz
- Exam (elaborations) • 17 pages • 2023
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- $22.49
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1.	Question: When comparing Be2 and H2: 
2.	Question: Atoms that are sp2 hybridized form ____ pi bond(s). 
3.	Question: The hybridization of the nitrogen atom in the cation NH2+ is: 
4.	Question: Which one of the following molecules has an atom with an incomplete octet? 
5.	Question: Nitrous oxide (N2O) is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for nitrous oxide based on minimizing formal charge overall? 
6....
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PORTAGE LEARNING CHEM 104 (CHEM104)MODULE 1
- Exam (elaborations) • 9 pages • 2024
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PORTAGE LEARNING CHEM 104 MODULE 1 
 
PORTAGE LEARNING CHEM 104 MODULE 1 
 
PORTAGE LEARNING CHEM 104 MODULE 1
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CHEM133 Week 7 Midterm Exam (All Correct)
- Exam (elaborations) • 27 pages • 2023
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1.	Question: What is the volume, in cubic centimeters, of a brick that is 4.0 in × 2.7 in × 8.0 in? 
2.	Question: A sailor circumnavigated the earth and covered 4,264,000 meters. Express this number in standard scientific notation. 
3.	Question: The state of matter for an object that has both definite volume and definite shape is 
4.	Question: How many of the following numbers contain 3 significant figures? 
5.	Question: In the spring of 2008, gasoline cost £1.029 per Liter in London. On the ...
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