Cl2 Study guides, Class notes & Summaries
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CEM 141-Exam 1 Latest Update Already Graded A
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CEM 141-Exam 1 Latest Update Already 
Graded A 
Matter is made up of Atoms 
The the smallest distinguishable part of an element Atom 
Can change overtime according to the evidence available Theories 
ALL atoms/molecules attract to one another due to Electrostatic forces 
________ lower potential energy of a system Attractions 
_____ raise potential energy of a system Repulsions 
Stable systems form where The attractive and repulsive forces are EQUAL or the potential 
energy is at a minimum 
The ...
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stationary engineer 2024 Latest Update Correct 100%
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Cl2 - ANSWER Chlorine 
 
boiler - ANSWER equipment that provides hot water or steam for various uses 
 
PRV - ANSWER PRESSURE RELIEVE VALVE 
 
NOWL - ANSWER Normal operating water level 
 
BTU - ANSWER British Thermal Unit 
 
absolute pressure - ANSWER gauge pressure (psi) + atmospheric pressure (14.7 psi) at sea level 
 
air changes per hour - ANSWER The hourly ventilation rate divided by the volume of a space. For perfectly mixed air or laminar flow spaces, this is equal to the number of times...
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OCR A Level Chemistry Paper 2 (H432/02) Synthesis and analytical techniques Mark Scheme for June 2023 (Verified)
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OCR A Level Chemistry Paper 2 (H432/02) Synthesis and analytical techniques Mark Scheme for June 2023 (Verified) Trend for all 3 hydrocarbons (1 mark): 
Boiling point increases with less branching 
OR less methyl/alkyl groups/side chains 
Explanation with comparison (3 marks): 
Branching and surface contact 
(Less branching gives) more (surface) contact / interaction 
(between molecules) 
Surface contact and London forces 
(More surface contact) gives more /stronger induced 
dipole(–di...
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OCR A Level Chemistry Paper 2 (H432/02) Synthesis and analytical techniques Mark Scheme for June 2023 | Verified.
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OCR A Level Chemistry Paper 2 (H432/02) Synthesis and analytical techniques Mark Scheme for June 2023 | Verified. Trend for all 3 hydrocarbons (1 mark): 
Boiling point increases with less branching 
OR less methyl/alkyl groups/side chains 
Explanation with comparison (3 marks): 
Branching and surface contact 
(Less branching gives) more (surface) contact / interaction 
(between molecules) 
Surface contact and London forces 
(More surface contact) gives more /stronger induced 
dipole(–d...
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Stationary Engineer Exam Questions with 100% Correct answers
- Exam (elaborations) • 9 pages • 2023
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Cl2 Correct Answer Chlorine 
 
boiler Correct Answer equipment that provides hot water or steam for various uses 
 
PRV Correct Answer PRESSURE RELIEVE VALVE 
 
NOWL Correct Answer Normal operating water level 
 
BTU Correct Answer British Thermal Unit 
 
absolute pressure Correct Answer gauge pressure (psi) + atmospheric pressure (14.7 psi) at sea level 
 
air changes per hour Correct Answer The hourly ventilation rate divided by the volume of a space. For perfectly mixed air or laminar flow sp...
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REHS Practice Test Questions With Complete Solutions
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Soil permeability procedure involves evaluating a soil core or test pit. What does the procedure yield? 
 
a. Permeability estimated seepage rate 
b. Permeability estimated application rate 
c. Permeability estimated range correct answer: b. Permeability estimate 
 
How does chlorine kill microorganisms and bacteria? 
 
a. By weakening enzymes and destroying internal organelles 
b. By attacking lipids in cell walls and destroying enzymes and structures inside 
c. By breaking bonds and poisoning...
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CEM 141-Exam 1 Questions With Correct Answers Already Passed!!
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Atoms - Matter is made up of 
Atom - The the smallest distinguishable part of an element 
Theories - Can change overtime according to the evidence available 
Electrostatic forces - ALL atoms/molecules attract to one another due to 
Attractions - ________ lower potential energy of a system 
Repulsions - _____ raise potential energy of a system 
The attractive and repulsive forces are EQUAL or the potential energy is at a minimum - Stable 
systems form where 
The well - The most stable part of a g...
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UNE Chem 1011 week 5-7 review Questions With Complete Solutions
- Exam (elaborations) • 5 pages • 2023
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For the reaction F2(g) ⇌ 2 F(g), the equilibrium constant at 223 °C is 7.3 x 10-13. If a sample of F2 is heated to 223 °C and allowed to reach equilibrium correct answer: nearly all of F2 will remain unreacted, with a very small amount of F present 
 
At equilibrium correct answer: the rate of the forward reaction is equal to the rate of the reverse reaction and the concentration of the reactants and products can be very different 
 
For the reaction 2 BrCl(g) ⇌ Br2(g) + Cl2(g), the equi...
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Water Distribution Grade 1 Certification ADEQ Practice Exam: 100% Verified Questions & Answers: Latest Updated
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What is the general definition of an ion? An _________ with a positive or negative charge 
(Ans- Atom 
 
A continuous positive pressure in a distribution system is essential for preventing what event? 
 (Ans- Backflow Event 
 
_____________ water pressure must be maintained to ensure adequate customer service during peak flow periods. However, minimum positive pressure must be maintained in mains to protect against backflow or back siphonage from cross-connections. 
(Ans- Minimum 
 
Name the m...
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CHEM 120 Week 8 Final Exam 2023(100% CORRECT SOLUTIONS) | Already GRADED A.
- Exam (elaborations) • 22 pages • 2021
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6. (TCO 6) A gas at a temperature of 95 degrees C occupies a volume of 165 mL. Assuming constant pressure, determine the volume at 25 degrees C. Show your work. (Points : 5) Using Charles’ Law, ( V1/T1) = (V2/T2). First, convert temperature to KELVIN (T1 = t1 +273) Thus, T1 = 95 + 273 = 368. We have V1 (165 mL) & T2 = (25 + 273) = 298. V2 = (V1*T2)/T1 = (165 mL*298)/368 = 133.6 mL. 0 7 Short 16 7. (TCO 6) A sample of helium gas occupies 1021 mL at 719 mmHg. For a gas sample at constant tempera...
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