M02 Quiz_ Chapter 3_ 55P-Spring 2024-Introductory Chemistry I
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M02 Quiz: Chapter 3
Due Apr 1 at 11:59pm
Points 10
Questions 10
Time Limit 30 Minutes
Allowed Attempts 2
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Absolute zero is equivalent to a temperature of -273 K.
4/30/24, 12:38 AM
M02 Quiz: Chapter 3: 55P-Spring 2024-Introductory Chemistry I
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0-75-100
0-298-373
A melting scoop of ice cream is an example of an exothermic process.
Air is a pure substance.
Like mass, energy can neither be created nor destroyed.
In a solid substance, the atoms or molecules oscillate and vibrate about a fixed point.
In order, what is the freezing point, room temperature and boiling point of water according to the
Fahrenheit scale?
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I am curious if someone could check these answers for me? I believe they turned out incorrect and am curious to see what I need to do to fix them. Thanks!
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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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4,6,7,8)
Question 19 of 20 (5 points) Question Attempt: 1 of 1
Time Remaining: 30:47
Hannah
10
= 11
= 12
=13
=14
=15
= 16
17
18
19
20
Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit
both sides of the equation to balance it, if you need to.)
do
Note: you are writing the molecular, and not the net ionic equation.
-
CaBr, (aq) + H,O(1)
Submit Assignment
Continue
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Methods of Analysis
Test #1: Polarity, or Effect of a charged rod on a stream of liquid:
This test was used to determine the relative polarity of the unknown liquid. The liquid was allowed to run out of a buret and a charged rod was brought up next to the stream. The observations were reported as to whether or not the stream of liquid responded to the charged rod and to what degree.
Try this at home with water and a plastic spoon. Rub the plastic spoon against a sweater and move it close to a small stream of water running out of your faucet!
Test #2: Volatility, or Rate of Evaporation:
A thermometer probe was wrapped with a strip of filter paper. This assembly was soaked in one of the liquids for one minute. The probe was removed, and the temperature change was monitored as the liquid evaporated. The results are given in Graph 1 below. (See Graph)
Graph 1: The curves generated of the change in temperature over time for the substances acetone, hydrogen monoxide, ethylene glycol,…
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Time required to elute substance Z
when N = 1000 = when N = 2000
The two quantities cannot be compared due to insufficient information.
when N = 1000 > when N = 2000
%3D
when N = 1000 < when N = 2000
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Simplify. Write each answer in scie
17) (5.4x 10")는 (7X/0")
19) (6 x 10°(4 x 10-1)
21) (7.68 x 10:)는 (9x/0°)
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Good Morning,
Please review the question and explain in detail how I come up with the correct answer. This is an example of what should be on my quiz tomorrow. So PLEASE explain clearly and plainly. We are also able to use our scientific calculators as well.
Thanks
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please
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if you could please help! i submitted this previously and was told that it looks incomplete. the questions are complete and there is no additional information to upload with the questions. again there are 6 questions and i have done a majority of them. i really just need help with question 2 and 3, however, if you could look at my answers for the questions i did and tell me if they are correct i will gladly rate you! thank you so much. I apologize if it is small, i made the font smaller to fit everything on one picture
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Ab GL B
art 3 SHOW WORK
ond Shipp: Attempt 1
Hu/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=5956136&isprv=&drc=0&qi=5726766&cfql=
Answer
units
▷ Add attachments to support your work
Question 4 (0.5 points)
SHOW YOUR WORK.
G
**N*-*OO
If 35.45 mL of 0.8121 M sodium carbonate solution reacts with excess lead (III)
nitrate solution to form aqueous sodium nitrate and solid lead (III) carbonate, how
many grams of lead (III) carbonate is formed?
On your paper with your name and date:
1. Go from ionic compound name to formula (review Chp 5 as much as needed)
2. Balance the equation (review Chp 7 if needed).
3. Do the calculation showing ALL units, just like I did in solution stoichiometry
lecture.
a #
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Color is an important indicator of temperature and is used to adjust a lab Bunsen burner. Match the color of the flame with
the temperature.
Cool temperature
Medium temperature
Hot temperature
Answer Bank
blue flame with a tall blue cone
blue with a short, bright blue flame
orange-colored flame that moves and flickers
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Class 11 chemistry please explain the reason of correct and incorrect answer//
Fast
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Blanks options are 0,1,2,3,4,5,6
solve the attached question
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please answer the last 3 sub-parts
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Question 4 is needed to answer question 5. I had provided the answers for question 4. I just struggled finding the answers for 5 and I was hoping someone would be able to explain/show the steps in writing. Thank you!
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Explain how OCompound A and Compound B will dissolve in water using the correct
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O
Mg Cl
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Consider the steps the student took in the following scenario. Then describe anything the student
did wrong and how it would have affected the student results (too high, low, or unchanged) and why.
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A student forgot to weigh the filter paper prior to filtering the salt from the sand. To make up for this,
the student weighed a different filter paper from the box and used that mass in the calculations.
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MnO, (aq) + 8H*(aq) + 5e → Mn²*(aq) + 4 H,O(1)
Al(s) → Alš*(aq) + 3 e
+
.ЗА.
Assign oxidation numbers to all metals whether they be elemental, monatomic ion, or in
a polyatomic ion, in questions (1) and (2),
.3B. Tell what is being oxidized and what is being reduced in each reaction in questions (1) and
(2).
.3C. Identify each half-reaction in question (2) as oxidation half-reaction or reduction
half-reaction.
.4. Do you need to know the temperature to calculate AG° from E°? Explain.
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.5.
For a reaction in which E° = -0.100 V and n = 1 mol electrons / mol, calculate AG°. State
+
your assumptions, if any, about temperature.
.6.
For a reaction in which E° = 0.100 V andn = 1 mol electrons / mol, calculate AG° at 25°C.
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.1. Refer to the table of standard reduction potentials.
Standard Reduction Potentials at 25 C
Reduction Half-Reaction
(V)
FAg + 2 €
H2O{aq) + 2 H*(aq)+ 2 6
Mno,taq) + 8 H*(aq) + 5 &
Clalg) + 2 e
CrOFMaq)+ 14 H*(aq) + 6 6-
Ozlg + 4 H*(aq) + 4 &
Bra() + 26
Ag*(aq) + e
Fe*(aq) + e
Ozl9) + 2 H'(aq) + 2 €
2(s)+ 26
Ozlg) + 2 HO) + 46
Cu (aq) + 2 €
Sn" (ag)+ 2 6
2 P(aq)
2 H2O()
→ Mn(aq) + 4 H;0()
→2 cr(aq)
2 Cr (aq)+ 7 H0()
→2 HO()
2 Br(aq)
Ag(s)
» Fe*(aq)
→H;Oz(aq)
→2 F(aq)
→4 OH"(aq)
2.87
1.78
1.51
1.36
1.33
3.
1.23
1.09
0.80
0.77…
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adds-up to 100. You may use the periodic table previously provided, a calulator and clean scrap paper.
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Question 4
A sodium chloride solution is 38% NaCl by mass and has a density of 1.12 g.ml, determine:
The Molarity of the solution
The molality of the solution
The mole fraction of water
A Moving to another question will save this response.
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Please answer the rest. they are very short answers. Thank you so much. final answ is enough. need 1,2,6
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Do questions 6,7,8 and 9. This is not graded. It is a study guide.
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Please help me, there are 2 parts attached as 2 screenshots and double and triple check your answers previous tutors have given me incorrect answers. The previous tutor raised their suspicion that these problems will be graded, I can assure you these are just problems for me to practice NOT for a grade, I just wanted to see if i get the right answer.
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Please confirm if my answer is correct or not. Due to the need for this to be correct I would like you to provide me with a confidence score in you answer on a scale from 1 to 10 how confident are you in your answer. Please be sure to double check your answer
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What are the applications of
analytical chemistry?
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- Simplify. Write each answer in scie 17) (5.4x 10")는 (7X/0") 19) (6 x 10°(4 x 10-1) 21) (7.68 x 10:)는 (9x/0°)arrow_forwardGood Morning, Please review the question and explain in detail how I come up with the correct answer. This is an example of what should be on my quiz tomorrow. So PLEASE explain clearly and plainly. We are also able to use our scientific calculators as well. Thanksarrow_forwardpleasearrow_forward
- if you could please help! i submitted this previously and was told that it looks incomplete. the questions are complete and there is no additional information to upload with the questions. again there are 6 questions and i have done a majority of them. i really just need help with question 2 and 3, however, if you could look at my answers for the questions i did and tell me if they are correct i will gladly rate you! thank you so much. I apologize if it is small, i made the font smaller to fit everything on one picturearrow_forwardAb GL B art 3 SHOW WORK ond Shipp: Attempt 1 Hu/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=5956136&isprv=&drc=0&qi=5726766&cfql= Answer units ▷ Add attachments to support your work Question 4 (0.5 points) SHOW YOUR WORK. G **N*-*OO If 35.45 mL of 0.8121 M sodium carbonate solution reacts with excess lead (III) nitrate solution to form aqueous sodium nitrate and solid lead (III) carbonate, how many grams of lead (III) carbonate is formed? On your paper with your name and date: 1. Go from ionic compound name to formula (review Chp 5 as much as needed) 2. Balance the equation (review Chp 7 if needed). 3. Do the calculation showing ALL units, just like I did in solution stoichiometry lecture. a #arrow_forwardColor is an important indicator of temperature and is used to adjust a lab Bunsen burner. Match the color of the flame with the temperature. Cool temperature Medium temperature Hot temperature Answer Bank blue flame with a tall blue cone blue with a short, bright blue flame orange-colored flame that moves and flickersarrow_forward
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