ch 9 and 10 Mock Exam
.pdf
keyboard_arrow_up
School
East Los Angeles College *
*We aren’t endorsed by this school
Course
227S
Subject
Chemistry
Date
May 2, 2024
Type
Pages
3
Uploaded by PrivateOctopus4095 on coursehero.com
Ch 9 and 10 Mock Exam 1. In a study of police gunfire reports dunng a recent year, 1t was found that among 540 shots fired by New York City police, 182 Iut their targets; and among 283 shots fired by Los Angeles police, 77 hut their targets. a. Usea 0.05 significance level to test the claim that New York City police and Los Angeles police have different proportion of hits. b. Construct a 90 % confidence mterval to estimate the difference between the two proportions of huts.
AVTINIUTIIILE nncaval vi & wicarnio 2. The National Association of Colleges (NAC) reported in 2003 that the mean starting salary for college graduates majoring in management information systems was $40,915 and for psychology major was $27.454. Suppose the NAC data are based on surveys of size 144 for each major, with a standard deviation of $10.000 for the management information systems majors and $7000 for the psychology majors. Construct and interpret a 95% confidence interval for the difference between two means. Wnte a conclusion sentence. 3. Does hypnotism result in a different success rate for men and women who are trying to quut smoking? Researchers at Science magazine analyzed studies mnvolving 5600 male and female smokers. Of the 2800 females, 644 quit smoking; of the 2800 males, 840 quit smoking. Construct a 90% confidence interval for the difference in proportion of males and females, and use the interval to judge whether there is a difference in the proportions. 8. A software manufacturer claims that its spell-checker can reduce spelling errors in text documents. A random sample of nine documents were wrntten and the number of spelling errors counted before and after the spell-checker was used. Assume that the differences are normally distnbuted. Document 1 2 3 4 5 6 7 8 Before 5 3 10 2 0 1 5 0 3 After 2 1 2 0 0 1 0 0 0 Difference 3 2 8 2 0 0 5 0 3 Is there evidence for the manufacturer’s claim? Perform the appropnate hypothesis test, using level of significance a =0.01
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Related Questions
AaBbCcDd AaBbCcDd AaBbC AaBbCct AaB AaBbCcD
1 Normal 1 No Spac... Heading 1 Heading 2
Title
Subtitle
1
Styles
Name
HHHHH
|||||
H-C-C=C-C-C-H
|
H
||
HH
Name
H
H-C-H
C=C
F
-H
—H
H
C
1
B.
H
H
Name
H
H
H
H1C
C
H
Η Η Η Η Η Η
| | | | | |
H-C₁-C₂-C₂-C-C-C-H
II
HH
H
H-C-H
H
-H
y
Find ✓
Replace
Select
Editing
14°C Cloudy
A
Dictate
Voice
F
Foo
arrow_forward
Inbox
(534) (
Conve
I Balanc
Answe
O Post A
CHEM
101 Ch X
С Чч-С-с
The Br
Collisi
ь Му Q
Unkno
O Search
E I make
app.101edu.co/#
Bryant's Gmail
Cascadia Canvas Lo... T GSBA Scholarship L...
HOMEGROWN TRA...
Learn Touch Typing...
C The Science of Well...
Investor360° ® Login
ClickUp
Reading list
>>
Question 20.d of 40
Submit
Collision theory states that as molecules or ions bump into each other, a reaction
will only occur if the collision has the correct amount of energy and impact is at
the right angle and location.
Describe how collision theory helps predict how temperature, pressure, and
concentration impact reaction rates.
Bathtub cleaners used to remove hard water salts usually contain acid to help
dissolve the salts.
Which will remove the salts faster?
A) 2.5% acid
B) 3% acid
C) 5% acid
10:19 PM
e Type here to search
59°F
W
8/26/2021
(8)
arrow_forward
ESF X
empt/quiz_start_frame_auto.d21?ou=9739790&isprv=&qi=11007766&cfql=0&dnb=0&fromQB=0&inProgress=1
ystems
Question 5 (1 point)
Ben starts walking along a path at 3 mi hr¹. Amanda starts jogging along the same path 1 hour later at 5 mi hr. After how much
time jogging does Amanda catch up to Ben?
3.5 hr
2.5 hr
2 hr
16
arrow_forward
Student Discipline Problems The data for a random sample of 32 months for the number of discipline problems that
occurred each month at a large high school are shown. Find the 99% confidence interval for the mean when σ 3. Round
your answers to one decimal place.
=
13
19
10
11
14
25 16 27 22 29
23
29
28
17
17
22
28
26
29
20
22
18 14
215
16 27 17
14
17
110
11 20
19
22
Send data to Excel
We are 99% confident that the mean is between 15.1 and 17.8 discipline problems per month.
arrow_forward
Help
100% 4A
To
Public Health Ch x
* HSC 258 - Major Projec X
MindTap - Cengage Lea X
C The Illustration To TH
d%=55750828934189288909969212&elSBN=9781305657571&id=D1061392007&nbld=21... *
Q Search th
References
Use the References to access important values if needed for this question.
For the following reaction, 24.7 grams of sulfur dioxide are allowed to react with 9.95 grams of oxygen
gas .
sulfur dioxide(g) + oxygen(g)
→ sulfur trioxide(g)
What is the maximum mass of sulfur trioxide that can be formed?
grams
What is the FORMULA for the limiting reagent?
grams
What mass of the excess reagent remains after the reaction is complete?
Submit Answer
arrow_forward
9) The following results were obtained in the determination of Vitamin E mass in
tablet samples.
Sample
1
2
3
4
5
6
Weight of Vitamin
E (mg)
249.1
249.9 251.2
250.2 244.8
251.0
i.
Determine whether any data should be rejected or not at 90 % confidence
level.
ii.
Calculate the mean and standard deviation of the data set above.
ii.
Express the mean weight of vitamin C at 99 % confidence interval.
arrow_forward
7. A piper delivers 10.4 mL , 10.2 mL, 10.8 mL , and 10,6 mL consecutive trials . Find the mean volume and average deviation from the mean.
arrow_forward
(1) COnvert the following
*13 dm to mm
*2.5x10-15 mole into pmole
* 3.5 x105μm into cm
arrow_forward
1-arr
In a study of the gas phase decomposition of phosphine at 120 °C
PH3(g)-
→1/4 P4(g) + 3/2 H2(g)
the concentration of PH3 was followed as a function of time.
It was found that a graph of In[PH3] versus time in seconds gave a straight line with a slope of -2.50×10² s1 and a y-intercept of -3.24.
Based on this plot, the reaction i v
O order in PH, and the half life for the reaction is
seconds.
zero
first
second
arrow_forward
4. Force-versus-Time Curve.
The magnitude of the net force exerted in the x direction on a 2.50-kg particle varies with
time as shown in the force-time curve. Find:
(a) the impulse of the force over the 5.00-s time interval;
(b) the final velocity the particle attains if its originally at rest;
(c) its final velocity if its original velocity is -2.00i m/s; and
(d) the average force exerted on the particle for the time interval between 0 and 5.00 s.
F, (N)
4
2
1
t(s}
1
2
st
arrow_forward
Which of the following would be a correct interpretation of a 99% confidence interval such as 4.1
arrow_forward
d'
II
ALEKS- Courtney Wh x
New Tab
X Lab 11-Atomic Finge
G pericdic table-Goog x ALEKS
rate Ex X
lab 10 empirical form
www.awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNslkr7j8P3jH-lijulplKKWv4bwenmyrLYoBHbAAsJtmzj53GErnx_viTdHbIGMF9jvgkSu_nrizREmdQXHPJbMzq0mOrXJcuonZITQhB66q?1oBw7QYjb
Courtne
45
O CHEMICAL REACTIONS
Theoretical yield of chemical reactions
reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) and gaseous water (H,0). What is the
(CH,(CH.),CH)
Gaseous butane
theoretical yield of carbon dioxide formed from the reaction of 5.81 g of butane and 28.5 g of oxygen gas?
Be sure your answer has the correct number of significant digits in it.
Terms of Use Privacy Center Accessibility
©2022 McGraw Hill LLC. All Rights Reserved.
Check
Explanation
1I0
->
$4
4.
8.
23
51
3.
k
00
S
a.
u
q
ctrl
145
alt
arrow_forward
Does the data set of 155.8, 158.4, 194.9,
164.8, 154.5, 184.3, 114.8 and 157.8 ppm
contain outlier(s)? (Given that
Qcrit.90 % confidence interval (n = 8) D
0.468)
%3D
%3D
O All data should be retained
O It is difficult to judge
O Both 114.8 and 194.9 ppm are
outliers
O 114.8 ppm is the outlier
O 194.9 ppm is the outlier
arrow_forward
5cd_i-5c7IV_IVquz8U4U02epq7z4kBnpYZ5iA/edit
&
nsions Help
EB Ga...
estions:
1
2
11
+ BIU
Key Words: global warming
et
3
1. Why is oxygen NOT a greenhouse gas?
A
4
> DOE-E X-E
greenhouse gas
6
infrared energy
3. The atmosphere on the planet Venus is almost 96 % carbon dioxide. What effect might its
concentration of carbon dioxide have on the average surface temperature on Venus?
is not a greenhouse gas because it is transparent to infrared light. and greenhouse gasses absorb
oxygen
infrared radiations. meaning it can not absorb heat.
2. Why is the effect of greenhouse gases in the atmosphere similar to the effect of glass surrounding a
greenhouse?
Page 3: The Structure of Greenhouse Gases Questions
4. What effect does an increase in the atmospheric carbon dioxide levels (and therefore rising
temperatures) have on the amount of water vapor in the atmosphere? Why?
3
7
I
5. Both coal and natural gas can be burned to generate electricity. However, burning natural gas produces
about half the…
arrow_forward
For the following data set: 18.3g, 184g
13g 15.0S Determines whether the
questionable data is retained or
discarded at 95% confidence. Critical Q
values
a. Reject
b. Retain
Valores críticos
Número de
datos
90%
95%
99%
3
0.941
0.970
0.994
0.765
0.829
0.926
0.642
0.710
0.821
5
arrow_forward
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
arrow_forward
8) Two different analytical methods are compared for determining Ca. The following
are two sets of data.
Set 1
Set 2
155.779
155.784
155.787
155.787
155.813
155.765
155.781
155.793
i.
i.
Determine the mean and the standard deviation in Set 1.
Calculate the 95% confidence limit for data in Set 1.
Identify a possible outlier in Set 2. Use the Q-test to determine whether it
can be retained or rejected at 95% confidence level.
ii.
arrow_forward
2. A student performed four trials to determine the molar mass of butane in Gas Laws lab. The average of the four trials was 68.7 g/mol and the standard deviation was 8.2 g/mol. How should his result be reported in a "mean +/- st. dev." format? Please make sure that you have proper number of sig figs.
a) 61 g/mol to 77 g/mol
b) 68.7 +/- 8.2 g/mol
c) 69 +/- 8 g/mol
d) 68.7 +/- 8 g/mol
arrow_forward
7. Pls answer asap . Pls provide accurate answer. Help me thank uuu. Handwritten thank u.
arrow_forward
I have trouble finding the answer and would really appreciate some help, pls explain and make sure its 1000% correct, thanks !!
arrow_forward
Inbox
(534)
Conve
Balan
b Answ
O Post /
CHEM
101 CI X
C The F
b Answ
bartle
barlel
b My Q
Unkn
O Searc
E I mak
app.101edu.co/#
Bryant's Gmail
Cascadia Canvas Lo... T GSBA Scholarship L...
HOMEGROWN TRA...
Learn Touch Typing...
C The Science of Well...
Investor360° ® Login
ClickUp
Reading list
>>
Question 24 of 40
Submit
Which of the following is a conjugate acid-base pair?
А) ОН, Н.О
B) NH3, OH-
C) OH, NH.
D) H2O, NH.
10:45 PM
e Type here to search
59°F
后
W
8/26/2021
(8)
arrow_forward
Please answer the rest. they are very short answers. Thank you so much. final answ is enough. need 1,2,6
arrow_forward
B Brock Sakai : CHEM 1P91 - Fall X
b My Questions | bartleby
ChemTeam: Combustion Analys X G oxygen molar mass - Google S X +
Ims.brocku.ca/portal/site/90b45528-0b04-4bd2-85b6-897046a1e998/page/7011eaa9-4e38-4b06-9e15-1973abb58ef6
Version 264 Assign 4
1 / 2
100%
+
2.
A mixture of Na2SO4 and its hydrate Na2SO4-10H2O has a mass of 1.5099 g. After heating to drive off
all the water, the mass is only 1.1410 g. What is the weight percentage of Na2SO4•10H2O in the original
mixture? Report your answer to 4 significant figures.
Molar masses: Na,SO4 142.04 g/mol; Na,SO4•10H2O 322.19 g/mol.
3.
MnCl2 reacts with AgNO3 in aqueous solutions to produce a precipitate of AgCl that can be filtered and
weighed. The balanced equation for the reaction is:
MnCl2 (aq) + 2 A£NO3 (aq) → 2 AgCl (s) + Mn(NO3)2 (aq)
Suppose you have a mixture that contains MnCl2, plus other compounds that do not react with AgNO3. If
0.5159 g of the mixture yields 0.8715 g of AgCl, what is the percentage of MnCl2 in the mixture?…
arrow_forward
Table 2- AA contents of lemon juice stored at 10°C
Time (mo)
AA content (mg/100 mL)
1
69
1.25
58
49
10
30
Clue: First, write this equation in the form of "y = ax + b" form. And, then determine the x
and y values. Give units wherever the units are applicable!!!!!
arrow_forward
Inbox
(534)
Conve
Balan
b Answ
O Post /
CHEM
101 CI X
C Cheg
bartle
bartle
barlel
b My Q
Unkn
O Searc
E I mak
app.101edu.co/#
Bryant's Gmail
Cascadia Canvas Lo... T GSBA Scholarship L...
HOMEGROWN TRA...
Learn Touch Typing...
C The Science of Well...
Investor360° ® Login
ClickUp
Reading list
>>
Question 25 of 40
Submit
Consider the reaction below. Which of the following species represent a conjugate
acid-base pair?
HSO: (aq) + HF(aq) = H2SO:(aq) + F-(aq)
A) HSO3¯, HF
B) HSO3, F-
C) HSO3, H2SO3
D) HF, H2SO:
10:51 PM
e Type here to search
59°F
小
W
8/26/2021
(8)
arrow_forward
10) The following results were obtained in an analysis of iron content in an ore
sample. The results reported as % Fe for each analysis, were as follow:
Samples no.
1
3
4
5
6
% Fe
20.10
20.50
18.65
19.25
19.40
19.99
i.
Calculate the mean and median from the set of the data above
ii.
If the true value of %Fe is 19.65 %, calculate the value for absolute error
and percentage relative error for sample no. 3
Using Q-test, justify whether an of the data must be rejected at 95 %
ii.
confidence level
iv.
Calculate the standard deviation and relative standard deviation of the
data.
arrow_forward
MoH t
7 Natt Cos, 7
three
Cuive Hhe fell balance nequatiiys
Hor He
absove realtion?
arrow_forward
Inbox
(534)
Conve
Balan
b Answ
O Post /
CHEM
101 CI X
C The F
bartle
bartle
barlel
b My Q
Unkn
O Searc
E I mak
app.101edu.co/#
Bryant's Gmail
Cascadia Canvas Lo...
T GSBA Scholarship ..
HOMEGROWN TRA...
Learn Touch Typing...
C The Science of Well...
Investor360° ® Login
ClickUp
Reading list
>>
Question 22 of 40
Submit
The conjugate acid of HSO:- is
A) SO;2-
B) HSO.-
C) HSO;?-
D) H2SO3
10:41 PM
e Type here to search
59°F
后
W
8/26/2021
(8)
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Related Questions
- AaBbCcDd AaBbCcDd AaBbC AaBbCct AaB AaBbCcD 1 Normal 1 No Spac... Heading 1 Heading 2 Title Subtitle 1 Styles Name HHHHH ||||| H-C-C=C-C-C-H | H || HH Name H H-C-H C=C F -H —H H C 1 B. H H Name H H H H1C C H Η Η Η Η Η Η | | | | | | H-C₁-C₂-C₂-C-C-C-H II HH H H-C-H H -H y Find ✓ Replace Select Editing 14°C Cloudy A Dictate Voice F Fooarrow_forwardInbox (534) ( Conve I Balanc Answe O Post A CHEM 101 Ch X С Чч-С-с The Br Collisi ь Му Q Unkno O Search E I make app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 20.d of 40 Submit Collision theory states that as molecules or ions bump into each other, a reaction will only occur if the collision has the correct amount of energy and impact is at the right angle and location. Describe how collision theory helps predict how temperature, pressure, and concentration impact reaction rates. Bathtub cleaners used to remove hard water salts usually contain acid to help dissolve the salts. Which will remove the salts faster? A) 2.5% acid B) 3% acid C) 5% acid 10:19 PM e Type here to search 59°F W 8/26/2021 (8)arrow_forwardESF X empt/quiz_start_frame_auto.d21?ou=9739790&isprv=&qi=11007766&cfql=0&dnb=0&fromQB=0&inProgress=1 ystems Question 5 (1 point) Ben starts walking along a path at 3 mi hr¹. Amanda starts jogging along the same path 1 hour later at 5 mi hr. After how much time jogging does Amanda catch up to Ben? 3.5 hr 2.5 hr 2 hr 16arrow_forward
- Student Discipline Problems The data for a random sample of 32 months for the number of discipline problems that occurred each month at a large high school are shown. Find the 99% confidence interval for the mean when σ 3. Round your answers to one decimal place. = 13 19 10 11 14 25 16 27 22 29 23 29 28 17 17 22 28 26 29 20 22 18 14 215 16 27 17 14 17 110 11 20 19 22 Send data to Excel We are 99% confident that the mean is between 15.1 and 17.8 discipline problems per month.arrow_forwardHelp 100% 4A To Public Health Ch x * HSC 258 - Major Projec X MindTap - Cengage Lea X C The Illustration To TH d%=55750828934189288909969212&elSBN=9781305657571&id=D1061392007&nbld=21... * Q Search th References Use the References to access important values if needed for this question. For the following reaction, 24.7 grams of sulfur dioxide are allowed to react with 9.95 grams of oxygen gas . sulfur dioxide(g) + oxygen(g) → sulfur trioxide(g) What is the maximum mass of sulfur trioxide that can be formed? grams What is the FORMULA for the limiting reagent? grams What mass of the excess reagent remains after the reaction is complete? Submit Answerarrow_forward9) The following results were obtained in the determination of Vitamin E mass in tablet samples. Sample 1 2 3 4 5 6 Weight of Vitamin E (mg) 249.1 249.9 251.2 250.2 244.8 251.0 i. Determine whether any data should be rejected or not at 90 % confidence level. ii. Calculate the mean and standard deviation of the data set above. ii. Express the mean weight of vitamin C at 99 % confidence interval.arrow_forward
- 7. A piper delivers 10.4 mL , 10.2 mL, 10.8 mL , and 10,6 mL consecutive trials . Find the mean volume and average deviation from the mean.arrow_forward(1) COnvert the following *13 dm to mm *2.5x10-15 mole into pmole * 3.5 x105μm into cmarrow_forward1-arr In a study of the gas phase decomposition of phosphine at 120 °C PH3(g)- →1/4 P4(g) + 3/2 H2(g) the concentration of PH3 was followed as a function of time. It was found that a graph of In[PH3] versus time in seconds gave a straight line with a slope of -2.50×10² s1 and a y-intercept of -3.24. Based on this plot, the reaction i v O order in PH, and the half life for the reaction is seconds. zero first secondarrow_forward
- 4. Force-versus-Time Curve. The magnitude of the net force exerted in the x direction on a 2.50-kg particle varies with time as shown in the force-time curve. Find: (a) the impulse of the force over the 5.00-s time interval; (b) the final velocity the particle attains if its originally at rest; (c) its final velocity if its original velocity is -2.00i m/s; and (d) the average force exerted on the particle for the time interval between 0 and 5.00 s. F, (N) 4 2 1 t(s} 1 2 starrow_forwardWhich of the following would be a correct interpretation of a 99% confidence interval such as 4.1arrow_forwardd' II ALEKS- Courtney Wh x New Tab X Lab 11-Atomic Finge G pericdic table-Goog x ALEKS rate Ex X lab 10 empirical form www.awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNslkr7j8P3jH-lijulplKKWv4bwenmyrLYoBHbAAsJtmzj53GErnx_viTdHbIGMF9jvgkSu_nrizREmdQXHPJbMzq0mOrXJcuonZITQhB66q?1oBw7QYjb Courtne 45 O CHEMICAL REACTIONS Theoretical yield of chemical reactions reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) and gaseous water (H,0). What is the (CH,(CH.),CH) Gaseous butane theoretical yield of carbon dioxide formed from the reaction of 5.81 g of butane and 28.5 g of oxygen gas? Be sure your answer has the correct number of significant digits in it. Terms of Use Privacy Center Accessibility ©2022 McGraw Hill LLC. All Rights Reserved. Check Explanation 1I0 -> $4 4. 8. 23 51 3. k 00 S a. u q ctrl 145 altarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning