Mole fraction Study guides, Class notes & Summaries
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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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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 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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Portage Chemistry 103 Module 2 Exam SOLUTIONS 100% CORRECT ANSWERS
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Portage Chemistry 
103 Module 2 Exam 
SOLUTIONS 100% 
CORRECT 
ANSWERS 
2.1: MOLECULAR WEIGHT 
A compound is made up of two or more elements combined in a definite 
ratio that is represented by a molecular formula. Each of these elements 
has a certain atomic weight, which can be found in the periodic table. 
The sum of the atomic weights of the atoms in the molecular formula 
is called the formula weight or molecular weight or formula mass. 
Ca3(PO4)2 
calcium phosphate 
Molecular Weight...
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SCI 200 midterm 1 Questions with Correct Answers
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why is energy important (5 things) - plays a role in every human endeavor 
 
responsible for standard of living, economic well being, our existence 
 
would not function as modern society without energy 
 
we can't grow economically without greater amounts of energy or more efficient use of energy 
 
fundamental to our future 
 
variety of energy resources - fossil fuels 
 
coal 
 
nuclear 
 
renewable resouces 
 
examples of fossil fuels - oil, natural gas, synthetic fuels 
 
what is...
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Chem 102 Exam 1(100% correct and graded A+)
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Intramolecular - Answer-forces holding atoms within molecules 
intermolecular - Answer-forces of attraction between molecules 
Ion-ion - Answer-strongest bonds; high melting temps; involve cations and anions 
ion-permanent dipole - Answer-salts + polar molecules (water); metal ions with water or other polar 
mol. 
dipole-dipole - Answer-bind molecules with PERMANENT dipoles; seen in BPs of simple molecules 
hydrophilic molecules - Answer-attraction to water; polar; O-H or N-H bonds; soluble in w...
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Chemistry II ACS Exam 91 Questions with Verified Answers,100% CORRECT
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Chemistry II ACS Exam 91 Questions with Verified Answers 
 
Phase - CORRECT ANSWER a physically distinct and homogenous part of a system 
 
intermolecular forces - CORRECT ANSWER the attractive and repulsive forces among the particles-molecules, atoms or ions in a sample of matter 
 
heat of vaporization - CORRECT ANSWER the enthalpy change occurring when 1 mol of a liquid substance vaporizes 
 
heat of fusion - CORRECT ANSWER the enthalpy change occurring when 1 mol of a solid melts 
 
heat of ...
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MCAT entrance exam all subjects combined questions & answers latest update
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m 
 
 
 
 
 
 
1.	Which of the following is the mRNA start codon in most cases? 
 
A.	UAA	B. AGU	C. AUG	D. UGA 
 
 
 
2.	Which of the types of RNA is the smallest? 
 
A.	mRNA	B. tRNA	C. rRNA	D. 
 
 
 
3.	Which of the following is not considered a pyrimidine? 
 
A.	C	B. T	C. U	D. G 
 
 
 
4.	Which of the following is paired correctly? 
 
A.	A-G	B. C-G	C. A-U	D. G-T 
 
 
 
5.	Which of the following characterizes a Western blot? 
 
A.	Antibody/protein hybridization	B. DNA/RNA combination	C. RNA ...
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MCAT General Chemistry Exam Questions and Answers
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STP - Answer-0°C and 1 atm 
 
Ideal Gas Law - Answer-PV = nRT 
 
At STP, 1 mol of gas will occupy ... - Answer-22.4 L 
 
Characteristics of an Ideal Gas - Answer-1. Gas molecules have zero volume 
2. Gas molecules exert no forces other than repulsive forces due to collisions 
3. Gas molecules make completely elastic collisions 
4. The avg. kinetic energy of gas molecules is directly proportional to the temperature of the gas 
 
Partial pressure of a gas (equation) - Answer-Partial pressure equa...
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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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