CHEM120 (CHEM120)

CHEM 120 Week 4 Discussion Question Acids & Bases While we often do not realize it, acidic and basic solutions are a part of our daily lives. Describe an example of when you have used an acidic or basic solution in your home. Let’s see how many different examples we can describe.

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2 pages

Written in 2019/2020

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CHEM 120 Week # 4 DQ 1 – Gases (graded) Matter exists in three different states: solid, liquid, and gas. Depending upon its physical properties, matter will be found in one of these states at ambient temperature and pressure. Describe a situation where a substance changed between the solid and liquid states or between liquid and gas states? Can you describe an example of when a substance changed between the gas and solid states? Let’s see how many different examples we can describe.

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2 pages

Written in 2019/2020

primequestgloballimited

CHEM-120 Week # 3 DQ 2 – Molarity and Solution Calculations (graded) Professionals in a scientific laboratory and in the healthcare field need to accurately prepare solutions for a number of reasons. If you wear contacts, you probably use a saline solution to rinse your contacts. What solutions do you use at work? How would you calculate the amount of solute to the solvent to prepare this solution? If you do not wear contacts but you use or make cleaning solutions for your housework, how wou...

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5 pages

Written in 2019/2020

primequestgloballimited

CHEM 120 Week 2 Discussion Question 1 – Chemical Names Sulfates, sulfites, nitrates, nitrites—how does one keep all of these similar but different names straight? Let’s begin this discussion by talking about the naming of different compounds. Why would it be important to make sure that you know which compound is associated with which name? To apply these concepts, look at problems 18 and 22 on page 122. Choose one part of the problem, and provide your answer.

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2 pages

Written in 2019/2020

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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. Using the periodic table of elements, pick one of these elements and determine the number of protons, neutrons, and electrons found in this atom.

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2 pages

Written in 2019/2020

primequestgloballimited

CHEM 120 Week 1 Discussion Question 1: Scientific Method and Calculations QUESTION: The steps of the scientific method are: observation, hypothesis, experiment, results, and theory.  Take a real world scenario and apply the scientific method, being sure to detail the controls on your experiment.  Describe a result that would confirm your hypothesis.

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3 pages

Written in 2019/2020

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CHEM 120 Final Exam Questions and Answers Question: (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): Question: (TCO 1) How many mL are in 3.5 pints? Show your work. Question: (TCO 3) What is the name of the following compound: Zn3P2? Question: (TCO 3) What is the name of the following compound: AgNO3? Question: (TCO 6) Calculate the pressure, in atmospheres, of 2.78 mol CO(g) in a 4.25 L tank at 51 degrees C. Que...

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19 pages

Written in 2019/2020

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CHEM 120 Final Exam Practice Questions and Answers CHEM 120 Final Exam Practice Questions 1. Question: (TCO 12) The DNA double helix is _____. (Pts. : 5) made up of two polynucleotide strands composed of adenine and thymine a puzzle to geneticists composed of adenine and guanine composed of two chromosomes 2. Question: (TCO 12) Which of the following best describes the action of enzymes in living systems? A specific enzyme generally catalyzes (Pts. :...

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4 pages

Written in 2019/2020

primequestgloballimited