Mole fraction Study guides, Class notes & Summaries
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Final Certification for CHEM 1212 Exam 2 Q&A
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Final Certification for CHEM 1212 Exam 
2 Q&A 
What is Molarity and the units for molarity? - CORRECT ANSWER-M=moles of 
solute/liters of solution, units are mol/liter 
What is Molality and the units for molality? - CORRECT ANSWER-m= moles of 
solute/moles of solvent, units are mol/kg 
What is Mass Percentage or Weight Percent and the units for mass percentage or 
weight percent? - CORRECT ANSWER-Mass %= (mass of solute/total mass of 
solution) x 100 
What is Mole Fraction and the units for...
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Open Exam 2023 questions and answers
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A virus has been discovered. The virus has no envelope and consists of a helical capsid surrounding its dsDNA genome. During assembly, the pac site of the genome ensures that it is properly packaged by the capsomeres. Which of the following amino acids is/are expected to be on the capsomere domain that interacts with the pac site? 
 
A. lysine 
B. methionine 
C. glycine 
D. arginine 
E. A and D 
Answer: A and D 
 
Explanation: DNA has a negative charge, so positively charged amino acids, such as...
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HESI A2 ENTRANCE EXAM: READING COMPREHENSION, CHEMISTRY, GRAMMAR, BIOLOGY, VOCABULARY & GENERAL KNOWLEDGE, CRITICAL THINKING, ANATOMY & PHYSIOLOGY AND MATH
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HESI A2 ENTRANCE EXAM: READING 
COMPREHENSION, CHEMISTRY, 
GRAMMAR, BIOLOGY, VOCABULARY 
& GENERAL KNOWLEDGE, CRITICAL 
THINKING, ANATOMY & PHYSIOLOGY 
AND MATH 
VERSION 2 
(With answers) 
Reading Comprehension 
Neurologists and biological psychologists have witnessed a sharp increase in the knowledge 
and understanding of particular structures of the brain over the past two decades. As technology 
becomes ever more advanced, scientists are able to isolate the functions of even small regions of ...
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UW Chem 162 (2023-2024) Exam 2 (with Complete Solutions)
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molarity correct answers mol solute/L solution 
 
molality correct answers mol solute/kg solvent 
 
mole fraction correct answers mol solute/(mol solute + mol solvent) 
 
% by mass correct answers mass solute/mass solution X 100% 
 
% by volume correct answers volume solute/volume solution X 100% 
 
% mass to volume correct answers mass solute(g)/volume solution(mL) 
 
Gibbs Free Energy correct answers G=H-TS 
 
Hsolution correct answers Hsolute + Hsolvent + Hmix 
 
endothermic when Hendo correc...
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MCAT General Chemistry (Princeton Review) Questions and Answers | Latest Update | 2024/2025 | Already Passed
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MCAT General Chemistry (Princeton 
Review) Questions and Answers | Latest 
Update | 2024/2025 | Already Passed 
 
What is the role of a Lewis acid and a Lewis base in a chemical reaction? 
 
 A Lewis acid is an electron pair acceptor, while a Lewis base is an electron pair donor. They 
interact to form a coordinate covalent bond where the base donates an electron pair to the acid. 
 
How does the concept of bond enthalpy relate to the strength of a chemical bond? 
 Bond enthalpy (or bond dissoci...
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CHEM 103 MODULE 1 EXAM 2023/202
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CHEM 103 MODULE 1 EXAM 2023/2024 
MODULE 1 EXAM 
Question 1 
Click this link to access the Periodic Table. This may be helpful throughout 
the exam. 
1. Convert 845.3 to exponential form and explain your answer. 
2. Convert 3.21 x 10-5 
to ordinary form and explain your answer. 
1. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places 
= 8.453 x 102 
2. Convert 3.21 x 10-5 = negative exponent = smaller than 1, move decimal 5 
places = 0.0000321 
Question 2 
Click this link to...
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Chem 210 Final Mastering Chem exam questions with 100% correct answers
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Highest: Nh3 SbH3 AsH3 PH3 
The hydrides of group 5A are NH3, PH3, AsH3, and SbH3. Arrange them from highest to lowest boiling point. 
 
 
 
Dispersion 
What is the strongest type of intermolecular force present in H2? 
 
 
 
Co2 
Identify the compound that does not have dipole-dipole forces as its strongest force. 
 
 
 
1 and 2 
Which of the following must be overcome during the boiling of acetonitrile, CH3CN? 
1. dispersion forces 
2. dipole-dipole forces 
3. hydrogen bonds 
 
 
 
I>III>...
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Sustainable Energy 1st Edition By Richard Dunlap - Test Bank
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Chapter 3 
Fossil Fuel Resources and Use 
 
 
3.1 A person's primary energy needs are supplied exclusively by burning oil (with an energy content of 3.85 × 107 J/L). If a person's average power consumption is 12 kW, how long would it take that person to use one barrel of oil (158.97 liters)? 
 
Solution The power 12 kW is the same as energy consumed at a rate of 12,000 J/s. Thus the amount of oil required per second is 
 
(12,000 J/s)/(3.85 × 107 J/L) = 3.12 × 10–4 L/s. 
 
Thus to consume...
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General Chemistry ACS EXAM Review 168 Questions with Verified Answers,100% CORRECT
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General Chemistry ACS EXAM Review 168 Questions with Verified Answers 
 
Rutherford's Gold Foil Experiment - CORRECT ANSWER proposed that atoms consist of a tiny, massive, positive nucleus surrounded by electrons 
 
nucleus - CORRECT ANSWER contains all the positive charge and nearly all the mass of the atom 
 
James Chadwick - CORRECT ANSWER discovered the neutron 
 
cathode rays - CORRECT ANSWER move from negative electrode to positive electrode (like electrons in a voltaic cell) 
 
Thompson...
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CHEM 120 MIDTERM PARTICIPATION Qs 1-17 Well Elaborated Answers Anew Update Version.
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The change in enthalpy (delta-H) can be calculated as: Δ H = n C p Δ T 
This is correct whether the reaction is conducted at constant volume or constant pressure or neither. - correct answer true 
 
Antoine Lavoisier discovered which element? - correct answer O 
 
Which of the following hypotheses is NOT part of John Dalton's "Atomic Theory"? - correct answer Mass is neither cre...
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