Chem 120 week 6 - Study guides, Class notes & Summaries
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CHEM 120 Week 7 Lab practicum (100% Correct)
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CHEM 120 Week 7 Lab practicum (100% Correct) You are given 500 mg NaCl. If it is dissolved in 7.5 mL water what would be the density 
in g/mL? 500 NaCL / 7.5 mL = 66.7 g/ml 
3. Provide name of the following organic compound 
CH3-NH2 Methylamine 
4. Provide structural formula of the following organic compound (3 points). 
Ethyl amine CH3CH2NH2 
5. You are given a pH meter and a series of solutions (solutions A, B and C). When you 
measured pH, the results were as follows: pH of solution A= 5.0; p...
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CHEM 120 Week 6 Discussion; Radiation - Radioactive Isotope; Cobalt-60 (Option 1)
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Option 1: 
While we often think of radiation as dangerous, radioactive isotopes are widely used in the field of healthcare as well as in many other fields. For your initial post, choose a radioactive isotope used in healthcare or another field and report on how your isotope is used. Be sure to answer both of the following questions as part of your initial post: 
 
a.	What type(s) of radioactive decay does your isotope undergo? 
b.	How is your isotope used? 
Use at least one outside source and ci...
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CHEM 120 WEEK 8 Final Exam 2023 with correct answers Already graded A+
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CHEM 120 WEEK 8 Final Exam 2023 
with correct answers Already graded 
A+ 
molarity = moles solute / liters solution 
0.25 M = moles NaOH / 0.035 L 
moles NaOH = 0.00875 moles NaOH 
1. (TCO 8) 35.0 mL of 0.25 M NaOH is neutralized by 23.6 mL of an HCl solution. The molarity of 
the HCl solution is (show your work): (Points : 5) 
2. (TCO 1) How many mL are in 3.5 pints? Show your work. (Points : 5) 
3.5 pints is equivalent to 1656.116 
1 pint = 473.176 ml 
3.5 pints* 473.176mL = 1656.116mL 
3. (TC...
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CHEM 120 Week 6 Discussion; Radiation - Internal Radiation Treatment (known as Brachytherapy).
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Option 2: 
Radiation comes in many different forms. We are exposed to many types of radiation each day, not only form the technology that surrounds us, but also from natural sources. Choose a source of radiation that a peer has not already chosen and discuss each of the following as part of your initial post: 
a.	Is the radiation ionizing or nonionizing? 
b.	Is the radiation released from this source expected to be dangerous? Why or why not? 
c.	Is this source of radiation natural or artificial?...
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CHEM 120 Week 8 Final Exam Questions-Answers (Version 1) 2023 UPDATE
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CHEM 120 Week 8 Final Exam Questions-Answers (Version 1) 2023 UPDATE6.	(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) 
7.	(TCO 6) A sample of helium gas occupies 1021 mL at 719 mmHg. For a gas sample at constant temperature, determine the volume of helium at 745 mmHg. Show your work. (Points : 5) 
8.	(TCO 12) If one strand of a DNA double helix has the sequence T T A G C G ...
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Chem 120 Answer key for Laboratory assignmet week 5 -6
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Chem 120 Answer key for Laboratory assignmet week 5 -6
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CHEM 120 Week # 1 DQ 1 – Scientific Method and Calculations
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CHEM 120 Week # 1 DQ 1 – Scientific Method and Calculations 
 
CHEM120 Week 1 
 
Scientific Method & Calculations 
 
Let’s explore the scientific method. Here is the situation: We are planting a garden. We have a variety of bulbs & potted plants. We do not have any directions on how or when to plant each of these items. We do not have any gardening books, magazines, or access to the Internet (Oh, the horror!). We need to observe a number of characteristics for these plants. 
 
What are some...
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CHEM-120 Week # 1 DQ 2 – Atoms and Atomic Structure
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CHEM-120 Week # 1 DQ 2 – Atoms and Atomic Structure 
 
 
There are a number of elements (minerals) that are important to human nutrition. These include sodium, potassium, calcium, chloride, magnesium, iron, copper, manganese, iodine, molybdenum, and selenium. There are many additional elements that are useful in industry. 
Using the periodic table of elements, pick one of these elements and determine the number of protons, neutrons, and electrons found in this atom. Be sure to check that you a...
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CHEM 120 Week # 1 DQ 1 – Scientific Method and Calculations
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CHEM 120 Week # 1 DQ 1 – Scientific Method and Calculations 
 
CHEM120 Week 1 
 
Scientific Method & Calculations 
 
Let’s explore the scientific method. Here is the situation: We are planting a garden. We have a variety of bulbs & potted plants. We do not have any directions on how or when to plant each of these items. We do not have any gardening books, magazines, or access to the Internet (Oh, the horror!). We need to observe a number of characteristics for these plants. 
 
What are some...
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CHEMISTRY 120 WEEK 3 ASSESSMENT - PROVIDING COMPLETELY CORRECT RESPONSES TO ALL QUESTIONS
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CHEM 120 WEEK 3 QUIZ- WITH 100% CORRECT ANSWERS Week 3 Quiz There are 6 multiple choice and two short answer questions. Each question is worth 5 points. To answer multiple choice questions, highli ght the right answer. To answer the short answer questions, show your work and calculations. DO NOT CHANGE THE FORMAT OF THE QUIZ PLEASE. 1. (TCO 5) Which coefficient is placed in front of O2 to complete the balancing of the following equation? C5H8 + ? O2 --> 5 CO2 + 4 H2O 1 3 5 6 7 2. TCO 5) Which...
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