Nh3 - Study guides, Class notes & Summaries
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BIO-1402- CH. 22 the Origin and History of Life Questions and Answers 100% Pass
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BIO-1402- CH. 22 the Origin and History 
of Life Questions and Answers 100% 
 
Pass 
 
Cell Theory 1. All organisms are composed of cells 
2. Cells are the smallest living things 
3. Cells arise only from pre-existing cells 
 
What are the required minimal set of macromolecules protobionts must have? 1. Self- 
replicating lipid vesicles 
 
2. Self-replicating genetic material. 
 
Plausible progression of Cells 1. Formation of organic molecules (spontaneous) 
2. Formation of organic polymers 
3. ...
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OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS WITH COMPLETE SOLUTIONS
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OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS 
WITH COMPLETE SOLUTIONS 
 
alkene undergoes what type of polymerisation - CORRECT-addition 
polymerisation 
Alkene to alcohol - CORRECT -Electrophilic addition 
conc (phosphoric) acid catalyst 
steam 
Haloalkane to nitrile - CORRECT -nucleophilic substitution 
ethanolic NaCN or KCN 
heat 
Haloalkane to primary amine (also makes NH4X) - CORRECT -Nucleophilic 
substitution 
Excess ethanolic NH3 with no further substitution 
HEAT under PRESSURE 
acyl ch...
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AP Chemistry Exam MCQ Multiple Choice Questions with Answers Advanced, Graded A+
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Question 1 refer to the following compounds at 25∞C and 1.0 atm. 
(A) CO2 
(B) PbO2 
(C) CaO 
(D) N2O5 
(E) Cu2O 
1. Contains an element in a +1 oxidation state 
Questions 4-7 refer to the following species. 
(A) H2O 
(B) NH3 
(C) BH3 
(D) CH4 
(E) SiH4 4. Has two lone pairs of electrons 5. Has a central atom with less than an octet of electrons 6. Is predicted to have the largest bond angle 7. Has a trigonal-pyramidal molecular geometry Questions #2 & 3 did not align with the
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ACS Chemistry I Final Exam Practice Test 2023 with 100% correct answers
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Acids & Bases: 
1. All are examples of Lewis acid-base reactions except 
(A) Cu2+(aq) + 4NH3(aq) →← [Cu(NH3)4]2+(aq) 
(B) HCl(g) + NH3(g) → NH4Cl(s) 
(C) H+(aq) + OH-(aq) →← H2O(l) 
(D) 2Na(s) + Cl2(g) → 2NaCl(s) - correct answer (D) 2Na(s) + Cl2(g) → 2NaCl(s) 
 
2. According to the Lewis definition, an acid is a species 
(A) having a hydrogen ion. (B) donating a pair of electrons. 
(C) accepting a pair of electrons. (D) accepting a hydrogen ion. - correct answer (C) accepting ...
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NBME HIGH YIELD QUESTIONS AND ANSWERS
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What are sentinel lymph nodes? 
First group of lymph nodes draining a specific organ 
Describe the lymph node drainage of the GI tract 
*Trachea and esophagus => Mediastinal 
*Liver, spleen, pancreas, stomach, upper duodenum => Celiac 
*Lower duodenum, jejunum, ilecum, colon to splenic flexure => SMA 
*Colon from splenic flexure to upper rectum => IMA 
*Lower rectum to anal canal (above pectinate line) =>Internal Iliac 
Anal rectum (below pectinate line) =>Superficial inguinal ...
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OCR CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS Haloalkane to nitrile - ANSWER-nucleophilic substitution ethanolic NaCN or KCN heat Haloalkane to primary amine (also makes NH4X) - ANSWER-Nucleophilic substitution Excess ethanolic NH3 with no
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OCR CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS 
 
 
 
Haloalkane to nitrile - ANSWER-nucleophilic substitution 
 
 
 
ethanolic NaCN or KCN 
 
 
 
heat 
 
 
 
Haloalkane to primary amine (also makes NH4X) - ANSWER-Nucleophilic substitution 
 
 
 
Excess ethanolic NH3 with no further substitution 
 
 
 
HEAT under PRESSURE 
 
 
 
acyl chloride/acid anhydride to SECONDARY amide - ANSWER-Nucleophilic substitution 
 
 
 
primary amine 
 
 
 
Acyl chloride/acid anhydride to PRIMARY amide - ANSWER-Nu...
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Science Bowl Chemistry Questions and Answers 100% Pass
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Science Bowl Chemistry Questions and 
 
Answers 100% Pass 
 
The ideal fuel for fuel cell use is: A. compressed natural gas B. reformulated gasoline C. 
hydrogen D. methanol Answer: HYDROGEN 
 
Out of the following choices, which is the correct name for N2O3: A. dinitrogen oxide B. 
dinitrogen dioxide C. dinitrogen trioxide D. dinitrogen tetroxide Answer: DINITROGEN 
TRIOXIDE 
 
Which of the following is an example of a buffer system: A. H2CO3 and water B. H2CO3 and 
NaHCO3 C. NH3 and N2 D. NaCl...
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FNH355 Exam Latest Update
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FNH355 Exam Latest Update ...
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WGU Biochemistry OA 2022/2023 Questions With Answers.
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WGU Biochemistry OA 2022/2023 Questions With Answers. Amino Acid backbone consists of Ans - 1. amino group 
2. carboxyl group 
3. alpha carbon 
4. R group 
Amino group: looks likes/consists of Ans - NH3+ 
Carboxyl group looks like/consists of Ans - cooAlpha carbon looks like/consists of Ans - CH 
The three Amino acid categories Ans - 1. hydrophobic (nonpolar) 
2. polar 
3. charged 
Hydrophobic Amino Acids Ans - non polar 
afraid of h20 
usually in the middle/core of the protein 
contains H + C...
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chap4 question bank Questions & Answers
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An unknown substance dissolves readily in water but not in benzene (a nonpolar 
solvent). Molecules of what type are present in the substance? 
A) neither polar nor nonpolar 
B) polar 
C) either polar or nonpolar 
D) nonpolar 
E) none of these 
 :~~ B) polar 
2. The interaction between solute particles and water molecules, which tends to 
cause a salt to fall apart in water, is called 
A) hydration 
B) polarization 
C) dispersion 
D) coagulation 
E) conductivity 
 :~~ A) hydration 
2 | P a g e...
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