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CHEM 111 LAB Exam 38 Questions with Verified Answers

Which shoes are appropriate for a laboratory? - CORRECT ANSWER tennis shoes/sneakers boots During an experiment, the procedure directs you to add 9.00mL of water to your sample. Which piece of laboratory equipment would be the best choice to precisely measure out that volume of water? - CORRECT ANSWER A 10mL graduated cylinder Any substance used in the laboratory will contain the hazmat diamond to inform you of the chemical's hazards. Based on the image below, how would you classify this chemical's health hazard?

• CORRECT ANSWER Extreme Danger Where should you dispose of waste after an experiment in the laboratory? - CORRECT ANSWER As instructed by the procedure and/or according to the SDS information. When completing assignments such as pre-lab quizzes and lab reports, I can use my notes, videos, and additional materials. When completing assignments such as pre-lab quizzes and lab reports, I can communicate with others and my instructor. When taking an exam, I can use my notes, videos, and additional materials. When taking an exam, I can communicate with others and my instructor. - CORRECT ANSWER True, True, True, False My instructor is required to report any suspected academic misconduct occurrences to Miami University.

Academic integrity is taken seriously in the Chemistry and Biochemistry Department. Don't put yourself in a situation that could lead to academic misconduct. If you have questions, ask! - CORRECT ANSWER True Decide whether or not the following situation is an example of academic misconduct. Science Sam is having trouble understanding the concepts for Experiment 9. He talks with his Instructor and with his friends in the course. They discuss the experiment information and results as well as the lab report questions. Sam then does his calculations on his own before submitting his assignment. Is this an example of academic misconduct? - CORRECT ANSWER No Decide whether or not the following situation is an example of academic misconduct. Cam Chemistry is panicked. He went to the lake for Memorial Day and completely forgot to log into Canvas all weekend. The first assignment is due tomorrow and he just sat down to start the report. Cam knows his friend took this class last semester and probably has his old lab reports in his room. Cam decides to take a quick peek at his friend's old work to make sure he is on the right track. Is this an example of academic misconduct? - CORRECT ANSWER Yes Decide whether or not the following situation is an example of academic misconduct. Sally Student has a busy week so she completes her pre-lab quiz and lab report over the weekend. Sally's roommate also has busy week, but didn't sit down to start her assignments until Friday afternoon. Sally feels badly for her roommate so she offers to pull up her submitted assignments to help her roommate choose the correct answers and answer the questions with her. Is this an example of academic misconduct? - CORRECT ANSWER Yes fabrication - CORRECT ANSWER recording or reporting made up data or results Falsification - CORRECT ANSWER the changing, altering, or omitting scientific data that could lead to incorrect results/conclusions plagarism - CORRECT ANSWER using others' ideas and words without clearly acknowledging the source of information

A researcher collects a large number of data from several different experiments. She finds that not all data points support her hypothesis and so she excludes them from her final report. What type of research misconduct is this describing? - CORRECT ANSWER falsification A researcher finds another study similar to his own and decides to include this data along with his own data to help confirm his hypothesis. He does not ask for permission to include the additional data, nor does he give the other researcher any credit. What type of research misconduct is this describing? - CORRECT ANSWER plagarism A student is collecting data in the research lab. He accidentally mis-programs his instrument and this leads him to collect data that he does not know is incorrect. He then publishes his findings in a research journal. Is this an example of research misconduct? - CORRECT ANSWER No A student is collecting data in the research lab. He accidentally mis-programs his instrument and this leads him to collect data that he does not know is incorrect. He then publishes his findings in a research journal. How might this issue have been prevented? - CORRECT ANSWER The student should have repeated his research experiment or had others repeat his experiment to verify the original results. A professor is working on a study to demonstrate the benefits of drinking lemonade while working out. His study is funded by the company, LemonyLuck. He gives five male subjects a cup of LemonyLuck lemonade during a game of soccer. All five subjects reported they felt better after drinking the lemonade. The professor then publishes his report stating "It can be concluded that lemonade is the most effective drink for all athletes during all types of activity". What are some possible concerns with this study? - CORRECT ANSWER The study was conducted on a small number of participants. The participates were all male.

The study was funded by the LemonyLuck company. What is needed to ensure a graph properly represents the data? - CORRECT ANSWER accurate scale (not too zoomed in or out), labeled axes (with units), and a descriptive title. There are several research misconduct issues with the Tuskegee Study. - CORRECT ANSWER Participants did not provide consent to participate. Participants were not given access to effect treatment for syphilis once it became available. One of the results of the research misconduct in the Tuskegee study was the development of a basic code of research ethics in the United States. What was this code called? - CORRECT ANSWER Some information and lab work was omitted from the studies intentionally. Some of the immediate results of the Vaccines and Autism (Links to an external site.) studies were the retraction of Dr. Wakefield's papers and the loss of his medical license. What does "retracted" mean in this situation? - CORRECT ANSWER The paper is no longer a part of the scientific record because it was found to be based on scientific misconduct. Some of the most common elements that will we will study in this course are hydrogen, oxygen, carbon, and nitrogen. Match each element name to its correct chemical symbol. - CORRECT ANSWER Hydrogen- H Carbon- C Oxygen- O Nitrogen- N Groups are in _______ of the periodic table. Periods are in ________ of the periodic table. From looking at the colors of the cells in the periodic table, you can conclude that the majority of the elements are __________ - CORRECT ANSWER Answer 1:columns Answer 2:rows Answer 3:metals

Which statement about the structure of the atom is TRUE? - CORRECT ANSWER The number of protons and neutrons do not have to be equal. Isotopes are atoms of an element with the same number of _____ , but a different number of ______ - CORRECT ANSWER Answer 1:protons Answer 2:neutrons Radioactivity is the spontaneous decay or disintegration of an unstable atomic nucleus accompanied by the emission of radiation. What is a radioisotope? - CORRECT ANSWER an isotope that spontaneously emits nuclear radiation. Match each element name to its correct atomic number. - CORRECT ANSWER Hydrogen 1 Copper 29 Potassium 19 Carbon 6 Fluorine 9 Oxygen 8 Uranium 92 Which of the following statement(s) is/are TRUE? - CORRECT ANSWER Chlorine (Cl) and Bromine (Br) are in the same group. Chlorine (Cl) and Bromine (Br) are both non-metals. Chlorine (Cl) and Bromine (Br) have similar chemical properties. Are "Co" and "CO" the same in Chemistry? What the does the symbol "Co" represent? What does the symbol "CO" represent? - CORRECT ANSWER Answer 1: no Answer 2: The element Cobalt. Answer 3: The compound Carbon Monoxide. What is the identity of the unknown element "Z", an atom with a mass number of 31 and an atomic number of 15?

- Z

15 - CORRECT ANSWER Phosphorous (P) Some periodic tables indicate the standard state (solid, liquid, or gas) of each element at room temperature (250C). Categorize each element into a metal, non- metal, or metalloid and then indicate its standard state of matter. - CORRECT ANSWER POTASSIUM: metal, solid ARGON: non-metal, gas MERCURY: metal, liquid SILICON: metalloid, solid SULFUR: non-metal, solid Symbols for isotopes contain three parts: the symbol of the element, the atomic number of the element, and the mass number of the specific isotope. From what you've learned, complete the following table. Please enter your numerical answers carefully. - CORRECT ANSWER Uranium- Atomic number: 92 Mass number: #of protons: 92

of neutrons: 143

Uranium- Atomic number: 92 Mass number: 238 #of protons:

of neutrons: 146

Carbon- Atomic number: 6 Mass number: 12 #of protons: 6

of neutrons: 12

Carbon- Atomic number: 6

Mass number: 14 #of protons: 6

of neutrons: 8

Atoms X, Y, Z, and R have the following nuclear compositions: 410/186 X, 410/183 Y, 412/ 186 Z, 412/185 R Which 2 are isotopes? - CORRECT ANSWER Y AND R An element's average atomic weight (or mass) is reported on the periodic table and is average mass of all of the naturally occurring isotopes of an element, based on their percent abundances. Match the correct definition to each term. - CORRECT ANSWER average atomic weight: weighted average mass of all naturally occuring isotopes of an element naturally occuring isotopes: found in nature, not man- made percent abundance: percentage of that isotope found in nature There are three naturally occurring isotopes of oxygen. The numbers on the top, left corner of the isotope symbol show a different atomic mass for each isotope. Complete the table below. - CORRECT ANSWER Oxygen-16 (16O) Atomic Mass (amu): 15. natural abundance: 99.762% Oxygen-17 (17O) Atomic Mass (amu): 16. Natural Abundance: .038% Oxygen-18 (18O): Atomic Mass (amu): 17. Natural Abundance: 0.200% A stable isotope is not radioactive. - CORRECT ANSWER True A radioisotope cannot be naturally occurring. - CORRECT ANSWER false

Determine if the following isotopes are radioisotopes. - CORRECT ANSWER Oxygen-16: no Uranium-235: yes Uranium-238: yes Carbon-12: no Carbon-14: yes