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3 Scientific Method _Essay3_First Experiment Results EXPERIMENT 1: Fill in the table below with the results of your first experiment. Food Starting Mass Ending Mass Source 1 Cooked : 39.500 g 39.700 g macaroni ‘ Uncooked S— I 39.500 g 39.200 g Apple slices | 39.500 g 40.400 g Cooked - eshadti I .500 g 39.800 g Raw steak 39.500 g 39.700 g | Water alone 39.500 g 38.100 g | 4 Scientific Method_Essay4 _Mass Changes Per Food Source EXPERIMENT 1: What was the change in mass for each mouse and food source? Food Source Change in Mass Cooked macaroni| +0.200g
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101 Chem101
b Search results for 'Using the infor x
B Brainly.com - For students. By stu X
G Using the information in the tab
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Question 19 of 44
Submit
Using the information in the table, the rate law for the reaction A(g) + 3 B(g) →
C(g) + 2 D(g) is
Rate
[A], (M)
[B], (M)
(M/s)
A) Rate =
k[A][B]³
1.25
0.100
0.850
B) Rate =
k[B]
C) Rate = k[A][B]
1.25
0.300
2.55
D) Rate = k[A][B]²
3.75
0.200
5.10
2:47 PM
P Type here to search
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Part D: Food Calories
Naked Juice
Serving size
240 mL
D1. Name of food product
D2. Mass of food nutrients in one serving
Fat
Carbohydrate 33
g, Protein
g,
D3. Calculations for Calories (Cal) or kilocalories (kcal) per serving
kcal (Cal)
Carbohydrate
Protein
kcal (Cal)
Fat
kcal (Cal)
D4. Total Calories (Cal or kcal) per serving
kcal (Cal)
D5. Calories (for one serving) listed on the label
cal (Cal)
D6. Percentage of total Calories from carbohydrate
%
(show calculations)
D7. Percentage of total Calories from protein
(show calculations)
%
D8. Percentage of total Calories from fat
(show calculations)
%
Q 4. How does your calculated number of Calories in one serving compare to the Calories listed
on the food product nutrition label? Comment on it.
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The "Nutrition Facts" on a label of a 64 fluid ounce container of apple juice states that a serving size of 8
fluid ounces contains 144 Calories and 16 milligrams of sodium.
Nutrition Facts
Serving Size 8 fl. oz. (240 mL)
Servings Per Container: 8
Amount Per Serving
Calories 144
% Daily Value*
0%
0%
8%
10%
Total Fat 0 g
Sodium 16 mg
Potassium 304 mg
Total Carbohydrate 29 g
Sugars 26 g
Protein 0 g
a) How many Calories does 1 fluid ounce of apple juice contain?
b) How many milligrams of sodium does 1 fluid ounce of apple juice contain?
c) How many Calories are in the entire container of juice?
d) How many milligrams of sodium are in the entire container of juice?
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Can you help me with questions 4, 5, 6, and 7 please?
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2. A student performs an experiment Her data is below:
Table 1. Masses Before and After Pulling Steel Wool Apart
Trial 1
Trial 2
Trial 3
158.93 g
157.45 g
145.67 g
Initial mass of
steel wool
Final mass of
steel wool
Difference
AVERAGE
158.92 g
-0.01 g
157.48 g
0.03 g
-0.003 g
145.64 g
-0.03 g
Draw a diagram to show the particles before and after pulling:
Before
After
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7. A concentrated sulfuric acid solution is 65.0% H₂SO4 by mass and has a density of 1.55 g/mL
at 20°C. What is the mass of 9.00 L of the concentrated sulfuric acid solution?
A. 5.85 kg
B. 9.00 kg
C 21.4 kg
D. 3.77 kg
€13.9 kg
9.0L |1.559
0.001
= 13.95
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Please help
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4. When you get your 5th correct answer, you will get a certificate that you can share with your
teacher letting your teacher know how you did. Please provide a screenshot of your certificate
showing you got this completed.
DATA
Part B: Measuring the Mass of Materials
Top Loading Balance
Mass
Empty Beaker (g)
Mass of Beaker + Paper Clips (g)
Mass of Paper Clips (g)
Analytical Balance
Mass of Empty Beaker (g)
Mass of Beaker + Paper Clips (g)
Mass of Paper Clips (g)
DATA ANALYSIS:
1. Show your calculation for the mass of paper clips using the top-loading and analytical balances.
2. Which of the balances, top-loading or analytical, has the most uncertainty per measurement?
Explain.
Page 10 of 14
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Chemist
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3. From the following data, compute the percent recovery of copper. If the masses given are correct (no weighing
errors), give a possible explanation for the fact that the percent recovery is greater than 100%.
Initial mass of copper
Mass of recovered copper + dish
Mass of evaporating dish
Mass of recovered copper
Percent Recovery
1.0531 g
180.9020 g
179.8463 g
%
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DATA:
Mass of potassium nitrate
mass of test tube and potassium nitrate
mass of test tube
mass of potassium nitrate
Volume of water taken
Buret readings: Final
gaml
Initial
Volume 4.97
added
Temperature at which
crystals appear
Total volume of
water in tube ML
1st
addition
2nd
addition
7.09ml 12.1ml
2.12 mal 7.09 ml 12.1ml
53.85839
43.9740g
9.9131
water. Record all data in the
4.97 9.98 15.78
4.97 9.98
3rd
addition
17.9 ml 21.1ml
78.8
Temperature of water when volume is measured
Density of water at when volume is measured (from reference) 0.970
Trial
|
||
52.0 39.1
21.4°C
15,18
4th
addition
18.98
17.9ml
|||
28.2
18.98
IV
2
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3. While determining the volume during this experiment (Part II), if the total volume of
the flask were incorrectly reported as 125 mL, how would this error affect the
calculated molar mass of the unknown volatile liquid? Explain.
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Adding or subtracting and multiplying or dividing measurements
Explanation
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1
A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass
of what's dissolved divided by the total volume of the solution.
Here's how the student prepared the solution:
• The label on the graduated cylinder says:
empty weight: 1.500 g
• She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 96.6 g.
She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the
markings on the graduated cylinder. The total volume of the solution was 97.7 mL.
What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant…
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Need all three plz
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Perform the following mathematical function.51.11 + (0.97/2.414 × 0.32150 × e.-3.25) + 1.52444
3.4 The written value of 1.0 μm meansa. 102 mb. 10-2 mc. 106 m d. 10-6 m e. 10-9 m
1.2 An example of a physical property isA) the reaction of rubidium with water to form rubidium hydroxideB) the density of boronC) the burning of sulfur to form sulfur dioxideD) the reaction of cesium with oxygen to form cesium superoxideE) the energy content of liquid sodium
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101 Chem101
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Question 37 of 44
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What is the molecularity of step 1 in the proposed mechanism?
A) unimolecular
Step 1 CI + O3 → CIO + O2
B) bimolecular
C) termolecular
Step 2 CIO + O3 → CI + 202
D) Cannot be determined from given
mechanism
4:50 PM
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Using the following mass standard data, calculate the Rx value.
mass of
mass of
area of
area of
isopentyl
acetate (g)
isopentyl
alcohol (g)
isopentyl
acetate peak
isopentyl
alcohol peak
80.0
1.10
1.28
189
Please report your answer to 3 decimal places. (No units required)
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In Part IV of this lab, the identity of an unknown liquid will be determined by observing
some of its physical properties.
In lab, a student experimentally obtained the following data recorded below:
Solubility in water: soluble
Density: 0.785 g/mL
Boiling point: 80.9 °C
Using Table 1 in the lab manual, determine the identity of the student's unknown liquid.
Note: Make sure to read the information box above the table!
ethyl alcohol.
cyclohexane
isopropyl alcohol
O There is not enough information to determine the identity.
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I Review | Constants | Periodic Table
Alexandra decides to climb Mt. Krumpett, which is 5000 m high. She determines that this will require a total of
2250 kcal of energy for the trip. For her food supply, she decides to take nutrition bars. The label states that each
bar contains 50 g of carbohydrates, 10 g of fat, and 40 g of protein.
Part A
How many nutrition bars should Alexandra pack?
Express the number of bars numerically.
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C) NH3
D) H2
E) All of these compounds can form hydrogen
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- 101 Chem101 b Search results for 'Using the infor x B Brainly.com - For students. By stu X G Using the information in the tab + -> A app.101edu.co I Apps y! email b bartleby B Brainly.com - For st. = Google Docs M gmail O eagle adv H school email S canvas m Monthly | My Classes 101 Chem101 general E Reading list Question 19 of 44 Submit Using the information in the table, the rate law for the reaction A(g) + 3 B(g) → C(g) + 2 D(g) is Rate [A], (M) [B], (M) (M/s) A) Rate = k[A][B]³ 1.25 0.100 0.850 B) Rate = k[B] C) Rate = k[A][B] 1.25 0.300 2.55 D) Rate = k[A][B]² 3.75 0.200 5.10 2:47 PM P Type here to search 67°F Clear 7/19/2021 近arrow_forwardPart D: Food Calories Naked Juice Serving size 240 mL D1. Name of food product D2. Mass of food nutrients in one serving Fat Carbohydrate 33 g, Protein g, D3. Calculations for Calories (Cal) or kilocalories (kcal) per serving kcal (Cal) Carbohydrate Protein kcal (Cal) Fat kcal (Cal) D4. Total Calories (Cal or kcal) per serving kcal (Cal) D5. Calories (for one serving) listed on the label cal (Cal) D6. Percentage of total Calories from carbohydrate % (show calculations) D7. Percentage of total Calories from protein (show calculations) % D8. Percentage of total Calories from fat (show calculations) % Q 4. How does your calculated number of Calories in one serving compare to the Calories listed on the food product nutrition label? Comment on it.arrow_forwardThe "Nutrition Facts" on a label of a 64 fluid ounce container of apple juice states that a serving size of 8 fluid ounces contains 144 Calories and 16 milligrams of sodium. Nutrition Facts Serving Size 8 fl. oz. (240 mL) Servings Per Container: 8 Amount Per Serving Calories 144 % Daily Value* 0% 0% 8% 10% Total Fat 0 g Sodium 16 mg Potassium 304 mg Total Carbohydrate 29 g Sugars 26 g Protein 0 g a) How many Calories does 1 fluid ounce of apple juice contain? b) How many milligrams of sodium does 1 fluid ounce of apple juice contain? c) How many Calories are in the entire container of juice? d) How many milligrams of sodium are in the entire container of juice?arrow_forward
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- 3. From the following data, compute the percent recovery of copper. If the masses given are correct (no weighing errors), give a possible explanation for the fact that the percent recovery is greater than 100%. Initial mass of copper Mass of recovered copper + dish Mass of evaporating dish Mass of recovered copper Percent Recovery 1.0531 g 180.9020 g 179.8463 g %arrow_forwardDATA: Mass of potassium nitrate mass of test tube and potassium nitrate mass of test tube mass of potassium nitrate Volume of water taken Buret readings: Final gaml Initial Volume 4.97 added Temperature at which crystals appear Total volume of water in tube ML 1st addition 2nd addition 7.09ml 12.1ml 2.12 mal 7.09 ml 12.1ml 53.85839 43.9740g 9.9131 water. Record all data in the 4.97 9.98 15.78 4.97 9.98 3rd addition 17.9 ml 21.1ml 78.8 Temperature of water when volume is measured Density of water at when volume is measured (from reference) 0.970 Trial | || 52.0 39.1 21.4°C 15,18 4th addition 18.98 17.9ml ||| 28.2 18.98 IV 2arrow_forward3. While determining the volume during this experiment (Part II), if the total volume of the flask were incorrectly reported as 125 mL, how would this error affect the calculated molar mass of the unknown volatile liquid? Explain. MacBook Air 80 DII F3 F4 F5 F6 F7 F8 F9 F10 & * 4 5 6 7 8 R Y * 00arrow_forward
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