Chem 103 lab exam 1 Study guides, Class notes & Summaries
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CHEM 103 Lab Exam 8 Questions and Answers | Latest Update 2023/2024 (Portage Learning)
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The unit “m” stands for _______ in this experiment. 
2. (4 points) Why was warming data used for estimating the freezing/melting 
point of the cyclohexane? 
3. (3 points) How much of the cyclohexane solvent was placed in the test? 
1.) molarity 
2.) It is considered reliable. 
It is a dependable predicator of the freezing/melting point of a substnace. 
it can determine the temperatures when the change occurs. 
3.) 10 mL of cyclohexane 
1. molality 
2. Solids tend to supercool, which gives fa...
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CHEM 103 Lab Exam 6 Questions With Answers Latest 2023/2024 (Portage Learning)
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Bonds within a molecule are called intra-molecular bonds. 
Non-polar (type) compounds are insoluble in water. 
intra-molecular Correct! 
Non-polar Correct! 
Question 2 10 / 10 pts 
Fill in the blanks: 
Pentane is insoluble in water because it is a/an nonpolar (type) compound. 
Ethyl alcohol has a boiling point of 76.4 C and n-propyl chloride has a lower 
boiling point of 46.3 C because the Hydrogen bonds holding ethyl alcohol 
together are stronger than the nonpolar bonds which hold n-propyl chl...
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CHEM 103 Lab Exam 1 – Portage Learning
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CHEM 103 Lab Exam 1 – Portage Learning. What device is used to smother small fires? 
1.) beaker 
2.) glass is strong combat things like acid and other kinds of harsh stuff. It is 
neutral with most lab chemicals. 
3.) tongs. 
4.) watch glass
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CHEM 103 Lab Exam 8 – Portage Learning
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CHEM 103 Lab Exam 8 – Portage Learning. How much of the cyclohexane solvent was placed in the test? 
1.) molarity 
2.) It is considered reliable. 
It is a dependable predicator of the freezing/melting point of a substnace. 
it can determine the temperatures when the change occurs. 
3.) 10 mL of cyclohexane
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CHEM 103 Lab Exam 8 – Portage Learning
- Exam (elaborations) • 8 pages • 2023
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CHEM 103 Lab Exam 8 – Portage Learning. Why was warming data used for estimating the freezing/melting 
point of the cyclohexane? 
3. (3 points) How much of the cyclohexane solvent was placed in the test? 
1.) molarity 
2.) It is considered reliable. 
It is a dependable predicator of the freezing/melting point of a substnace. 
it can determine the temperatures when the change occurs.
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CHEM 103 ALL EXAM include Lab 1-7 exam, no exam 8 and Module and Final EXAM portage learning
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All Chem 103 exam include Lan and Module and final exam questions and answer portage learning, Lab exam 1-7 portage learning/ABC Nursing
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CHEM 103 Lab Exam 5 – Portage Learning
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CHEM 103 Lab Exam 5 – Portage Learning . According to Boyle’s law, as the volume of a gas decreases, the 
pressure _________. 
3. (6 points) A sample of gas occupies a volume of 10.5 L when the pressure 
is 14.3 psi. Use Boyle’s Law to calculate the volume (L) when the pressure is 
decreased to 12.8psi. Show the calculation. 
Answer: 
1. A syringe was used, and the volume was read from the graduation 
markings.
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CHEM 103 Lab Exam 2 – Portage Learning
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CHEM 103 Lab Exam 2 – Portage Learning. The reaction of AgNO with Cu is a single displacement type reaction. 
During the reaction of AgNO with Cu a blue (color) solution and black/gray 
(color) solid are formed. 
3 
3 
single displacement
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CHEM 103 Lab Exam 4 – Portage Learning
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CHEM 103 Lab Exam 4 – Portage Learning. Does the following reaction give off heat or absorb heat? 
Explain briefly. 
C D H = +263Kcal/mol 
3. (4 points) In one experiment in the video, room temperature water was 
mixed with water at about 38 degrees. To what temperature (about) did the 
mixture of the two water samples come to after setting for a few minutes? 
Answer: 
1. The heat depends on the amount of substance. If the amount of substance 
is doubled, then the heat doubles. Other propertie...
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CHEM 103 Lab Exam 3 – Portage Learning
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CHEM 103 Lab Exam 3 – Portage Learning. A 1.1000 gram hydrate sample chosen from Na2CO3∙10H2O, AlCl3∙6H2O, 
MgCl2∙6H2O and BaCl2∙2H2O was heated and found to lose 0.5841 gram of H2O. (1) 
Show the calculation of the % H2O in the unknown hydrate sample. (2) Show the 
calculation of the % H2O in each of the hydrate compounds and identify the unknown 
hydrate from the list. 
Atomic weights: H = 1.008, O = 16.00. MWs: Na2CO3∙10H2O = 286.15, AlCl3∙6H2O = 
241.43, MgCl2∙6H2O = 203.301 ...