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CHEM 103 Lab Exam 1 (Portage learning), Exams of Chemistry

CHEM 103 Lab Exam 1 (Portage learning)/CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 Lab Exam 1 (Portage learning)CHEM 103 La

Typology: Exams

2023/2024

Available from 11/25/2023

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as the module, problem sets, Internet, tutor, etc., with the exception of
your
Lab Exam 1- Requires Respondus
LockDown Browser
Due No due date Points 30 Questions 3
Time Limit 60 Minutes
Requires Respondus LockDown Browser
Instructions
Please read the following before beginning the exam:
You will NOT be recorded via webcam for lab exams. You will not be
prompted to show your ID or do an environment scan. However, you
will still need to take the exam using LockDown Browser.
You must show your work for calculations or give an explanation for
short answer questions in order to receive credit.
You may only use the methods and explanations provided by this
course for your answers.
You MUST use the Periodic Table provided by the course.
The use of printed versions of the Periodic Table and will be
considered a violation of the Academic Integrity Policy.
Your lab notebook and/or lab report should be used when taking
theexam. You may either print it out or use handwritten notes.
During lab exams you may not use any outside source of information such
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Download CHEM 103 Lab Exam 1 (Portage learning) and more Exams Chemistry in PDF only on Docsity!

as the module, problem sets, Internet, tutor, etc., with the exception of your

Lab Exam 1- Requires Respondus

LockDown Browser

Due No due date Points 30 Questions 3

Time Limit 60 Minutes

Requires Respondus LockDown Browser

Instructions

Please read the following before beginning the exam: You will NOT be recorded via webcam for lab exams. You will not be prompted to show your ID or do an environment scan. However, you will still need to take the exam using LockDown Browser. You must show your work for calculations or give an explanation for short answer questions in order to receive credit. You may only use the methods and explanations provided by this course for your answers. You MUST use the Periodic Table provided by the course. The use of printed versions of the Periodic Table and will be considered a violation of the Academic Integrity Policy. Your lab notebook and/or lab report should be used when taking theexam. You may either print it out or use handwritten notes. During lab exams you may not use any outside source of information such

Question 1 10 /^10 pts lab notebook/report mentioned above. You may only copy and paste from within the exam itself or from the provided calculator but not from an outside source. The only items you should have in front of you are the exam itself, 1- pieces of blank scratch paper, a pen/pencil, a calculator (non-cell phone), and your lab notebook/report. Attempt History Attempt Time Score LATEST Attempt 1 19 minutes 30 out of 30 Score for this quiz: 30 out of 30 Submitted Nov 10, 2022 at 11pm This attempt took 19 minutes. Scientific Calculator (https://www.desmos.com/scientific) Answer the following five questions:

  1. What is the wide-mouthed glass container shown below?
  1. Why is glass so often used as a material for lab containers?
  2. What is the metal device used to hold hot containers?
  3. What is the weighing dish used for solids?
  4. What device is used to smother small fires? Your Answer: 1.) beaker 2.) glass is strong combat things like acid and other kinds of harsh stuff. It is neutral with most lab chemicals. 3.) tongs. 4.) watch glass 5.) fire blanket.

Question 3 10 /^10 pts

  1. The mass of the graduated cylinder on top loader balance #1 was? grams. Your Answer: 1.) Analytical balance. 2.) 21.5957 grams 3.) 21.35 grams 4.) 92.97 grams 5.)47.62 grams
    1. The analytical balance measures mass to 0.0001 grams. 2. The mass of the metal cylinder on analytical balance #3 was 21. grams. 3. The mass of the metal cylinder on the triple beam balance was 21.35 grams. 4. The mass of the cell phone on top loader balance #1 was 92.97 grams. 5. The mass of the graduated cylinder on top loader balance #1 was 47.62 grams. Scientific Calculator (https://www.desmos.com/scientific)

Answer the following three questions:

  1. Which of the volume-measuring devices was determined to be least accurate in the volume measurement experiment?
  2. What was the calculated volume for the pipet in the volume measurement experiment?
  3. Water at 22.5oC has a density of 0.99766 g/ml. A 10.3 ml sample of water at 22.5oC, delivered from a buret had a mass of 10.1532 grams as measured on an analytical balance. (1) Show the calculation of the actual volume as determined from this mass. (2) Show the calculation of the % error in volume delivered for this buret. % error = (│delivered value - calculated value│/ delivered value) x 100 Your Answer: 1.) 100 mL grad cylinder I think? 2.) 10.00mL 3.)
  4. calc for actual volume M with a line D= 10.1532/0.99766=10.18mL 2.) calc for % error 10.3-10.18/10.3x100=1.17% error

The volume-measuring device determined to be least accurate in th the calculated volume for the pipet in the volume measurement exp

  1. (1) Actual volume = M / D = 10.1532 / 0.99766 = 10.18 ml (2) % error = (│10.3 - 10.18│/ 10.3) x 100 = 1.17% error Quiz Score: 30 out of 30