Density Lab Report

(number 15, for the second picture)

Can you help me with questions 4, 5, 6, and 7 please?

11 of 26 To how many significant figures should each answer be rounded? (6.626 × 10-34 J •s) (2.9979 × 10% m/s) equation A: 4.890 × 10-7 m 4.062185153374 x 10-19 J (unrounded) After rounding, the answer to equation A should have O1 significant figure. O5 significant figures. O2 significant figures. O3 significant figures. 04 significant figures. (6.022 x 1023 atoms/mol) (0.855 g) 20.18 g/mol = 2.551 × 1022 atoms (unrounded) %3D equation B: contact us help terms of use careers privacy policy about us

STARTING AMOUNT X A particular beer is 6.50 % ethanol by volume (C₂H₂O). If a single bottle of beer contains 750.0 mL of beer, what mass, in g of ethanol (C₂H₂O), is present in the bottle? The density of ethanol is 0.789 g ethanol/mL ethanol 3.85 6.18 ADD FACTOR x( ) 61.8 0.385 6.50 Question 16 of 24 0.001 9.10 × 104 38.5 10 ANSWER 0.01 1 %v ethanol mL ethanol mL ethanol/mL beer 0.789 750.0 g ethanol RESET 3 0.1 100 mL beer 1000 0.618 Submit +

Best fit line? R^2 value? Density of water?

7. Air has a density of 0.001226 g/mL. What volume of air would have a mass of 1.0 lb? (1.0 Ig = 454 g) %3D A) 3.7 ml B) 7 mL C) 815.6 mL D) 37 mL E) 3.7 x 105 mL O a O b O c d.

1. 1. What is the difference between dilution and concentration? Bi U Font Family - AA A OE- 8 00:59:53 PREVIOUS 1 of 9 NEXT 23 2 & 4. W e 国

Please answer both questions.

Chemistry temp: 8C, density 0.800 g/ml based on this data, how many molecules are contained in 30ml of ethanol at 8C? (MM of ethanol is 46.08 g/mol) a.) 8.6 x 10^-25 molecules b.) 3.1 x 10^25 molecules c.) 4.9 x 10^23 molecules d.) 6.7 x 10^26 molecules

||| O STATES OF MATTER Using Avogadro's Law tly cloudy Carbon disulfide gas and oxygen gas react to form sulfur dioxide gas and carbon dioxide gas. What volume of sulfur dioxide would be produced by this reaction if 1.52 cm³ of carbon disulfide were consumed? 3 Also, be sure your answer has a unit symbol, and is rounded to 3 significant digits. 11 Explanation Check 8 0.0 X ㅁ S x10 Q Search WILLETTE 1/3 a Jessic C 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center | Accessibility

Ho overall ode fontereactioraboe! 3. 3. what is 2 .20 40 40 200xto 2.00 0.200 A. (गीन)ेमण्य A+BJAB 17

People Tab Window Help ubmission History: 2. X 101 Chem101 E AWR prep 5 Google Docs Question 15 of 17 An atom of a particular element has a volume of 7.8 x 10-31 m3 What is this volume in cubic nanometers ? ADD FACTOR ANSWER RESET *( ) %3D 10° 10-6 (10-6)3 7.8 x 10 22 (10°)a (1)3 106 7.8 x 10 31 7.8 x 10-4 1 10-9 7.8 x 104 (10°)a nm nm3 um m3 um3 FEB 6. 3. tv

Use water displacement method: measure to the 10ths place!

PERCENT WATER IN A HYDRATE DATA/CALCULATION SHEET NAME 1.. crucible, cover, BaCl2 2H2O _\8, a0G! g crucible and cover 14.0188g BaCl 2H2O 4.1873 g first second third weighing weighing weighing crucible, cover, anhydrous BaCl, 7.5824 17.5815 H2O lost (use your last weighing) 17.58158 % water, experimental SHOW CALCULATION % water, theoretical (See prelab) % error SHOW CALCULATION

Help!

Part 1) what is average density of water samples. ( 1 g/ml)  Part 2) what is percent error.

Chemical conversions 1. What is the molecular weight of nitrobenzene, often known as C_6*H_5*O_2*N?  2. How many moles of nitrobenzen are contained in 50.0 g? 3. What is a substance's density in grammes per cubic centimetre if its specific gravity is 1.203? 4. How much space is filled by 50.0 g of nitrobenzene in cubic metres, feet, and inches? 5. What is the pressure at the base of a cylindrical container holding nitrobenzene that has a base that is 1 inch in diameter? What does gauge pressure mean? 6. How many molecules of nitrobenzene are in 50.0 g?

solve question 4 and 5 please

h ||| = O STOICHIOMETRY Solving for a reactant using a chemical equation Ammonia (NH3) chemically reacts with oxygen gas (0₂) to produce nitric oxide (NO) and water (H₂O). What mass of nitric oxide is produced by the reaction of 3.29 g of oxygen gas? Be sure your answer has the correct number of significant digits. Explanation Check 48 0 □ x10 X S 99+ 40 How VUDU — a Day' D UP lij hulu Ⓒ2023 McGraw Hill LLC. A. prime video

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

Express 109 miles per hour, in meters per second. (1 mile = 1609.34 meters) i m/s e Textbook and Media Save for Later Attempts: 0 of 2 used e to search 99+ Cop 米 10 17 19 ho h2 #3 %24 4. 7 8. W R T Y P D G K %23 立 2S

G clearing cookies in C x Blackboard Learn P 1_1_Chemistry_and_ x P GOB_13e_Ch_01_Wc x | + bccd.blackboard.com/ultra/courses/_668676_1/cl/outline ✓ Question Completion Status: QUESTION 8 1 points w* Saved Which one of the following substances will float in gasoline, which has a density of 0.74 g/mL? The density of each substance is shown in parentheses. OA) table salt (D = 2.16 g/mL) OB) balsa wood (D = 0.16 g/mL) (D = 1.59 g/mL) O C) sugar CD) aluminum (D = 2.70 g/mL) 1 points QUESTION 9 What is the density of a substance with a mass of 45.00 g and a volume of 26.4 mL? Save Answer

A Mel B C Ginny Carl D Steve Student Trial #1 (g) 0.5 Carl Ginny Mel Mass of Baking Soda Steve 0.42 0.44 0.47 Trial # 2 (g) Trial #3 (g) 0.51 0.46 0.43 0.43 Students conducted an analysis of baking soda in chemistry lab. During the activity, they had to calculate the mass in grams of the baking soda being used. Some student data appears in the table. At the end of the activity, the teacher told the students that the actual mass of baking soda was 0.45 grams. Which student had the most accurate and precise data? 0.46 0.5 0.45 0.45 2 of 8 12:11

Chemistry pls the question is asking for the weight percent of the solution. 4. A solution is prepared by dissolving 171 g of CdCl2 in enough water to make exactly 250.0 mL of solution. If the density of the solution is 1.556 g/mL, what is the weight percent of CdCl2 in the solution? Data: Calculations: Result:

Purpose - Part 2: The second purpose is to determine the relationship between the ml, g, and cm³ of the same amount of water. Procedure - Part 2: 1. Using a ruler, measure the length and the width of the inside of your box to the nearest 0.1 cm. Record the values in the table below. 2. Each person in your group chooses a value between 20 and 100. Record everyone's value in the last column. 3. Carefully place the box and water on the balance. Measure the mass of the box and water and record the value on your data page. 4. Fill the graduated cylinder with the amount of water you wrote in the first row of the last column. Pour that water into your box. Using a balance, measure the mass of your box to the nearest 0.1 g. Record the value on your data page. 5. Subtract the mass of the box to determine the mass of the water. 6. Measure the height of the water inside the box. 7. Find the Volume of the box by multiplying length x width x height. 8. Repeat this procedure with 3 volumes that you…

Please solve mass of water and calculations :)

8. Mass of water displaced by CO₂ gas (g) 9. Density H₂0 (g/mL) Lookup the temperature values (round to the nearest whole number) in Table 3 of the Lab Guide or use the Density Calculator in the More Information link below. More Information click to open a Water Density calculator. 10. Volume of water displaced by CO2 gas (mL) 11. Volume of CO2 gas (L) 236.714 @23.4°C 0.9975 Edit NG 2 Info ID102 NG 2 Info ID112 247.031 @24.0°C 0.9972 Edit NG 2 Info ID103 NG 2 Info ID113

Chrome File Edit View History Bookmarks Profiles Tab Window Help Sun Sep 26 1:21 PM Calendar Course Home Significant Figures Calculator x b Chemistry Question | bartleby x + openvellum.ecollege.com/course.html?courseld=16846218&OpenVellumHMAC=Ddbacfbcfc14ee9f30d6c137a34986a18#10001 L Aluminum, Express your answer in calories per gram per degree Celsius to two significant figures. 0.214 0.897 Al(s) Copper, Cu(s) 0.0920 0.385 ? Gold, Au(s) 0.0308 0.129 Iron, Fe(s) 0.108 0.452 cal/(g .° C) Silver, Ag(s) 0.0562 0.235 Titanium, Ti(s) 0.125 0.523 Submit Request Answer Compounds Ammonia, 0.488 2.04 NH3 (s) Part B Complete previous part(s) Ethanol, 0.588 2.46 C2 H6 O(s) Sodium chloride, Provide Feedback Next > 0.207 0.864 NaCl(s) Water, H2 O(1) 1.00 4.184 Water, H2 0(s) 0.485 2.03 4,419 SEP 1 CC étv 26 280 00 圖

O Macmillan Learning One important test for kidney disease involves measuring the levels of bicarbonate (HCO,) in blood. Normal bicarbonate levels for a person ranging in age from 18 to 59 years old is 23-29 mmol/L. A lab purchased a new instrument to measure bicarbonate levels in blood and needs to certify it against their current instrument. The bicarbonate levels in the blood of a 38 year old woman was measured using the old and new instrument. The blood was tested 6 times using each instrument. The mean concentration of bicarbonate using the old instrument was found to be 24.4 mmol/L. with a standard deviation of 1.54 mmol/L. The new instrument yielded a mean concentration of 25.5 mmol/L with a standard deviation of 0.48 mmol/L... Determine if there is a significant difference in the standard deviations of the two sets of measurements made by the two instruments at the 95% confidence level. Determine the value of Fale Feale= 10.293 Determine the value of Fuble- Refer to the table…