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Seattle Central College *
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163
Subject
Chemistry
Date
Apr 30, 2024
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Problem Set 1 - Ch 10 & 19 – Part A Purpose: Problem set 1 is a three part assessment of the learning objectives outlined for chapters 10 & 19. Students will be assessed on their ability to synthesize and apply the concepts covered in class, as well as recall information and reflect on their learning and problem solving strategies. Task: Students will work individually to complete all 3 parts of the assessment. Students may not work together, they may not work with tutors, and they may not use online resources outside the class resources posted on canvas. Part A:
This is a take home set of challenging questions that will require students to synthesize and apply the concepts covered in class. Part B:
This will be an in-class set of questions provided by the instructor to assess student’s ability to recall information used in Part A of the problem set. Part C:
This will be a set of reflection questions both about student’s problem solving strategies and their learning process. This part may include a class or small group discussion. Part A Evaluation: Students that attempt all questions in good faith for all parts of the problem set by the deadline will earn a Revise grade. Students that submit an assignment that meets the list of requirements below (or revise their work with instructor feedback to meet the requirements) will earn a Complete grade on the assignment. Problem Set 1 Part A Standards to Earn a Complete Grade Students attempt each question in good faith and revise questions with instructor feedback if requested. Short answer responses are formatted in complete sentences and paragraphs. Claims are supported by evidence with scientific reasoning. All work is shown for calculations. Student demonstrates a strong understanding of the material and is able to apply and synthesize the concepts covered. Student work may have small errors but does not show large gaps in knowledge. The student will answer 4/5
questions without significant errors. The student is able to answer recall questions about the concepts in the challenge questions and are able to discuss their responses to each question with the instructor if it is necessary to clarify their work.
1.
In the MC Escher painting below 3 boxes have been drawn and labeled A, B,
& C
. Which one represents the smallest unit cell
? Justify your answer with evidence (observations of the image) and scientific reasoning that includes a definition of “unit cell.” 2.
Calcium carbonate, the material shellfish shells are made of, can crystallize into two different unit cells, shown below. The green balls are Ca
+2
ions and the grey ball and red ball molecules are CO
3
-2
. Determine the chemical formula of calcite and aragonite from the unit cells above. Show all work. 3.
Lead and Tungsten are commonly used metals in fishing weights, in use they will have the same mass, but be different sizes, implying the density of the two metals are different. Compare the density of lead and tungsten using the information below. Will the lead or the tungsten fishing weight be smaller when they are the same mass (ex: 0.45 kg for off-shore fishing)? Lead: atomic radius of 0.175 nm Tungsten: atomic radius of 0.136 nm A
B
C
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Related Questions
26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about
36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds
the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons.
Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving
assumptions you make in this calculation
rea
L-36 Tile
fiDw
ill it cost2 The density of gold is
27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50
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Please answer questions 4a, 4b, and 4c. The questions are provided in the attached image. Thank you.
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hi ! can you provide a step-by-step solution with explanation for this problem ? i really want to work on chemistry since i'm having a hard time answering questions. thank you <3
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Need help solving questions 4a, 4b, and 4c? Thanks!
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(a) Is it true that 26.3 mpg gasoline translates to 319 g CO:/mi?
i. Convert mpg (miles per gallon) to miles per kg (of gasoline) using the density of gasoline
ii. Convert kg of gasoline to kg of C assuming the overall formula for gasoline is CıH1a5
ii. Convert kg of C to kg of CO2
iv.
Now finally compute g CO:/mi corresponding to 26.3 mpg and compare to 319 g CO2/mi
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pls help! (all 3 are part of the same question) thank you so much!
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Can someone answer nos. 5 to 10? Thank you very much! If it's not too much, provide an explanation for each number. Thanks!
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Number 6, I've been struggling with these types of problems all year trying different tutors and going to the professor trying to have them explain how to go about it. How would I even start to set the problem up?
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Quiz # 2
Due 16 Mar at 14:30
Points 10
Questions 5
Available until 16 Mar at 14:30
Time limit 20 Minutes
Instructions
الكويز عبارة عن حل شيت والمعطيات لكافة الأفرع
25 ml of 1M HCI (ag) at 23.4°C was added to 25 ml of 1M NaOH at 23.4°C. The final temperature of the reaction
mixture was 29.7 C. Calculate A H, (KJ/mol). Density of each solution is 1.04 g/ml and Specific heat of water
=4.184 J/g.C
This quiz was locked 16 Mar at 14:30.
* Previous
1O
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professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/mol
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So I went throught the material to re learn this question we had in class but I still don't get it. Maybe I don't understand my professors style of teaching as much. Can someone help me answer these questions and undertand them. Thank you
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You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc.
The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.
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For items 7-8 choose the letter of the best answer. No need to write the explanations.
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Answer questions 1 and 2 according to the data given.
Dater Weight of cream i: 326 kỳ. Table shows some data
obtained directly from Lactascan instrument.
Fat % SNF % Lacto-
density
27.32
30.23
Raw milk 4.15 7.97
Skim milk 0.08 8.26
Q1. Calculate fat percent of creamn
A) 46 B) 28 (C) 3D D) 0.046
آدرما 396
100 x
Q2. Calculate efficiency of the cream separator.
A) 100%
B98%
C) 97%
D) 96%
E) 87.2%
amount
2500 L
E) 0.28
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Please help me how to solve this problem in detail so i can understand it. Thank you very much.
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S Window
Help
E 100%
Tue Apr 20 14:34 Ayemoba ldowu Emmanuel Q
A moodle.ciu.edu.tr
CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 (page 1 of 15)
• Emmanuel Ayemoba
0-2021 EXAMS I CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30
1
A compound contain 5.9265% hydrogen and 94.0735% oxygen has a molar mass 34.01468g/mole. Determine empirical and molecular
formula of this compound.
put of
Select one:
O a. HO, H20
O b. None of them
O c. H,0, HO
O d. H202, HO
O e. HO, H202
Next page
1 CHEM 110-SPRING 2020-2021 QUIZ 1
Jump to...
week 1 (03.03.21, wednesday, 08.30)
10/4/2021 - 17:30-18:00
Introduction ►
20
tv
МacBook Air
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Hi! I am having trouble with these questions and really need assistance on them, thank you so much!
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STARTING AMOUNT
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ADD FACTOR
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Convert 23.4 kJ to calories
2.34 x 104
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4184
kcal
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4.184
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ANSWER
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7
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Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats.
Calculate the number of mg of Allura Red present in an 8 fluid ounce glass of the beverage you used in this lab. Assume that the concentration of Allura Red in the beverage is 0.000054 M.
The molar mass of Allura Red is 496.42 grams/mol
1 fl oz = 29.5735 mL
Do not include units with your answer.
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Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats.
Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs.
The molar mass of Allura Red is 496.42 grams/mol
1 fl oz = 29.5735 mL
2.205 lbs = 1 kg
You may assume…
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Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats.
Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs.
The molar mass of Allura Red is 496.42 grams/mol
1 fl oz = 29.5735 mL
2.205 lbs = 1 kg
You may assume…
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4..In your words and in a few sentences, explain what the embodied energy is and how solution processing fits in with the sustainability thematic.
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Why do you need to study chemistry? How is it applicable to your course which is Criminology? In ten (10) sentences.
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5) hw help!!
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Explain your rationale for using the summative assessment (below) from the lesson plan on mixing substances in a 5th-grade classroom based on the below standard and learning objective, including how it aligns with the learning objective.
Summative Assessment
Summative:
Components of the Lab Report
Purpose: The student should clearly state the purpose of the experiment, which is to determine whether the mixing of two or more substances results in new substances.
Procedure: The student should describe the steps they took to conduct the experiment. This includes the substances they chose to mix and the safety equipment they used.
Observations: The student should record any observable changes that occurred when the substances were mixed. This could include a color change, the formation of a precipitate, or a change in temperature.
Conclusion: The student should state whether a new substance was formed based on their observations. They should also reflect on their accuracy in…
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I am still working through understanding this, the full steps to compare to what I already have written down I need to see how much I really did correctly! Please help!
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I need answers for # 2-9 on this worksheet
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Related Questions
- 26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50arrow_forwardPlease answer questions 4a, 4b, and 4c. The questions are provided in the attached image. Thank you.arrow_forwardhi ! can you provide a step-by-step solution with explanation for this problem ? i really want to work on chemistry since i'm having a hard time answering questions. thank you <3arrow_forward
- Need help solving questions 4a, 4b, and 4c? Thanks!arrow_forward(a) Is it true that 26.3 mpg gasoline translates to 319 g CO:/mi? i. Convert mpg (miles per gallon) to miles per kg (of gasoline) using the density of gasoline ii. Convert kg of gasoline to kg of C assuming the overall formula for gasoline is CıH1a5 ii. Convert kg of C to kg of CO2 iv. Now finally compute g CO:/mi corresponding to 26.3 mpg and compare to 319 g CO2/miarrow_forwardpls help! (all 3 are part of the same question) thank you so much!arrow_forward
- Can someone answer nos. 5 to 10? Thank you very much! If it's not too much, provide an explanation for each number. Thanks!arrow_forwardNumber 6, I've been struggling with these types of problems all year trying different tutors and going to the professor trying to have them explain how to go about it. How would I even start to set the problem up?arrow_forwardQuiz # 2 Due 16 Mar at 14:30 Points 10 Questions 5 Available until 16 Mar at 14:30 Time limit 20 Minutes Instructions الكويز عبارة عن حل شيت والمعطيات لكافة الأفرع 25 ml of 1M HCI (ag) at 23.4°C was added to 25 ml of 1M NaOH at 23.4°C. The final temperature of the reaction mixture was 29.7 C. Calculate A H, (KJ/mol). Density of each solution is 1.04 g/ml and Specific heat of water =4.184 J/g.C This quiz was locked 16 Mar at 14:30. * Previous 1Oarrow_forward
- professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/molarrow_forwardSo I went throught the material to re learn this question we had in class but I still don't get it. Maybe I don't understand my professors style of teaching as much. Can someone help me answer these questions and undertand them. Thank youarrow_forwardYou work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.arrow_forward
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Recommended textbooks for you
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
Chemistry: The Molecular Science
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ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Introduction to General, Organic and Biochemistry
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ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning