Moles and molarity Study guides, Class notes & Summaries
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CHEM 120 Week 5 Exam 2 (Units 3 and 4)
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1.	A solution is prepared by dissolving 50 g of KCl (74.6 g/mol) to a volume of 1 L. What is the molarity of this solution? 
2.	You prepare a solution by dissolving 20 g of NaCl to a volume of 350 mL in water. What is the mass/volume % concentration of this solution? 
3.	When the following reaction goes in the forward direction, what is the base? 
4.	You are preparing a buffered solution. So far, your solution contains H2PO4- ions, what would you add to this solution to prepare your buffer sy...
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TAMU BIOL 111 FLETCHER FINAL EXAM WITH VERIFIED SOLUTIONS ALREADY GRADED A+
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describe the basic functions all life forms must accomplish 
-response to environmental stimuli & maintain homeostasis 
-uptake and processing of nutrients/energy 
-regulation 
-growth and reproduction 
 
 
 
compare and contrast eukaryotic and prokaryotic cell types 
Prokaryotes: 
-circular chromosomes, no nucleus, no organelles, 3.5 bya 
-DNA concentrated in nucleoid 
Eukaryotes: 
-linear chromosomes, nucleus, organelles, 1.5 bya 
-DNA concentrated in nucleus 
Both: 
-cellular function takes p...
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Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT OF 100) Portage learning (Latest Update)
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Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT OF 100) Portage learning (Latest Update) 
 
 
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 = smalle...
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CHEM 1110 FINAL EXAM
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density formula -d = m/v 
 
m = mass 
v = volume 
 
temp conversions -K = C + 273 
 
C = 5/9 (F - 32) 
 
F = (C x 9/5) + 32 
 
average atomic mass formula -(mass A)(% abundance) + (mass B)(% abundance) 
 
molecular mass formula -(mass A)(# of atoms A) + (mass B)(# of atoms B) 
 
mass of element formula -(mass of element in sample / total mass of sample) * 100 
 
molarity with moles formula -M = n/v 
 
M = molarity 
n = moles of solute 
v = liters of solution 
 
molarity with mass formula -(M)(m...
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AP Chemistry Exam Review
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atomic number CORRECT ANSWER The same as the number of protons in the nucleus of an element; it is also the same as the number of electrons surrounding the nucleus of an element when it is neutrally charged. 
 
mass number CORRECT ANSWER The sum of an atom's neutrons and protons 
 
isotopes CORRECT ANSWER Atoms of an element with different numbers of neutrons 
 
Avogadro's number CORRECT ANSWER 6.022×10²³ particles per one mole 
 
Moles CORRECT ANSWER grams/molar mass 
 
Standard Temperatur...
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HESI A2 CHEMISTRY-CHRISJAY FILES (1) (1)
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HESI A2 ENTRANCEEXAM 
FOR 
CHAMBERLAINCOLLGE 
OF NURSING 
2023 QUESTIONS WITH 
ANSWERS 
CHEMISTRY 
HESI A2 CHEMISTRY V1/V2 FILE 
1. If a Hydrogen isin a compound, what would its oxidation number be? 
+1 
2. What isthe oxidation number of any simple ion? 
+1 or -1 depending on the charge of the ion 
3. How many kilograms are in a pound? 
0. kg 
4. What is the temperature for freezing point of water in Celsius? 
0 degrees Celsius (32°F for Fahrenheit) 
5. What is the conversion of Celsius to Fah...
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CHEM 207 REVIEW EXAMS QUESTIONS AND ANSWERS
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CHEM 207 
REVIEW EXAMS QUESTIONS AND ANSWERS 
 
Practice questions for the exam with solutions. For you to do well on the exam, please work on the questions before looking at the solutions. If you find an error, let me know so I can let everyone know. REMEMBER THE EXAM IS ON Monday, Sept 28th on Top Hat. The exam will have 20 questions and only one hour. Studying the lecture ppts and lecture questions would also be helpful. 
Lecture 1A questions: Density and stat analysis, Q and T tables, % Tole...
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Semmelweis Entrance Exam Questions and Answers Already Passed
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Semmelweis Entrance Exam Questions 
 
and Answers Already Passed 
 
Electron configuration for cations Subtract 1 from exponent of highest n-value orbital (ex. 
remove from 4s before 3d) 
 
Ag+ = [Kr]5s^1 4d^9 
 
Electron configuration for anions Add 1 to closest orbital 
 
Cl- = [Ne]3s^2 3p^6 
 
Atomic orbitals s, p, d, f 
 
Primary vs secondary structures of proteins Primary - AA chain (linked by peptide bonds) 
 
Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets) 
 
Mo...
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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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Test Bank Essential Cell Biology 5th Edition Alberts Hopkin
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Test Bank Essential Cell Biology 5th Edition Alberts Hopkin 
Table of Contents CHAPTER 1: CELLS: THE FUNDAMENTAL UNITS OF LIFE ................................................................ 2 CHAPTER 2: CHEMICAL COMPONENTS OF CELLS ........................................................................ 21 CHAPTER 3: ENERGY, CATALYSIS, AND BIOSYNTHESIS .............................................................. 48 CHAPTER 4: PROTEIN STRUCTURE AND FUNCTION ......................................
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