03 Fascinating Phenom

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

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

Use calculator to solve the problems. Write your answer in the correct scientific notation with the correct number of sig fig. Enter numbers only, no units. Enter scientific notation as (number)E(exponent) for example: enter 2 x 104 as 2E-4 (note there are no spaces) (9.4 x 10° mm) (4.5 x 10° mm) =

You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilogramsme=9.11×10−31kilograms. How would you enter this number into the answer box? Enter your answer in kilograms using three significant figures. Note that the units are provided for you to the right of the answer box. View Available Hint(s)

[References] Use the References to access important values if needed for this question. A soda bottle is found to have a volume of 772 mL. Using unit analysis, show what the volume of this soda bottle is in L. Use one of the following to set up the conversion factor. 1 kg = 1000 g =1L Visited 100 cm=1 m 1000 mg=1g 3 1 mL=1 cm³ 1000 mm=1m 772 mL X (number) (unit) (number)(unit) Submit Answer L Try Another Version 1 item attempt remaining Previous Next>

Part B Gather all of your pennies dated before 1982. Then follow the steps to complete the table. Include units as necessary. Record the number of pennies dated before 1982. Weigh (as a group) the pennies dated before 1982. Record the total mass. If you’re unfamiliar with using an electronic balance, watch this video before continuing. Calculate and record the average mass of a single penny. If you need help with the calculation, visit the averaging data section of the math review. number of pennies: 8 combined mass of the pennies (g): 49.2 average mass of a penny (g): 5.525 Part C Now gather all of your pennies dated after 1982. Complete the table for the post-1982 pennies using the same steps from part B. number of pennies: 9 combined mass of the pennies (g): 51.7 average mass of a penny (g): 5.744 Part D In parts B and C, you measured the average mass of each group of pennies. Now you’ll measure their volume. (For this part, assume that the pennies dated before and after…

Part B Gather all of your pennies dated before 1982. Then follow the steps to complete the table. Include units as necessary. Record the number of pennies dated before 1982. Weigh (as a group) the pennies dated before 1982. Record the total mass. If you’re unfamiliar with using an electronic balance, watch this video before continuing. Calculate and record the average mass of a single penny. If you need help with the calculation, visit the averaging data section of the math review. number of pennies: 8 combined mass of the pennies (g): 49.2 average mass of a penny (g): 5.525 Part C Now gather all of your pennies dated after 1982. Complete the table for the post-1982 pennies using the same steps from part B. number of pennies: 9 combined mass of the pennies (g): 51.7 average mass of a penny (g): 5.744 Part D In parts B and C, you measured the average mass of each group of pennies. Now you’ll measure their volume. (For this part, assume that the pennies dated before and after…

You need to show all calculations for this problem with correct units and significant figures on a separate sheet of paper. You will upload this into the Lab Final Exam Assignment folder within 10 minutes upon completion of the exam. You must submit your final answer in Blank 1 before the time for exam expires. During your vacation you took a metal detector to Cannon Beach and discovered an unusual piece of metal. After cleaning it, you took your metal sample to the PCC Chemistry Lab after the COVID-19 campus closures, to determine the density of the metal. The mass of the metal was 185.9 grams. When the metal was placed in a graduated cylinder containing 9.63 mL of water the volume increased to 28.45 ml. What is the density of the metal sample?

6 of 11 I Review | Constants | Periodic Table Part B Find the value of 17 2 15 11 Though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. Enter the numerator followed by the denominator, separated by a comma. View Available Hint(s) VO AE ? Your submission doesn't have the correct number of answers. Answers should be

Instructions: Solve each problem and express your answer with correct units and significant figures. You should use the unit conversion factor table listed on the last page for all your unit conversions. You may have to use multiple conversion factors if a direct conversion factor is not provided Show all your work! Solve the following equation for the varlables stated in most cases you can only simplify the expression and a numerical answer is not possible. Show you work 1) Solve for x: 2x + 5= 9x-23 2) Solve for C: F = 1.8C +32 C = PV 3) Solve for P: = R nT PV 4) Solve for T: nT T = 5) Solve for b: a2 + b2 = c2 b = %3D 6) Solve for r: A = Trr2 %3D

Why is it inappropriate to report yields with decimal-place accuracy (as opposed to whole numbers)?

» Significant Figure Rules 01 >> 02 >> 03 >> 04 >> 05 >> All nonzero digits are significant. Zeros that appear between other nonzero digits are always significant. Zeros that appear in front of all of the nonzero digits are called left-end zeros. Left-end zeros are never significant. Zeros that appear after all nonzero digits are called right-end zeros. Right-end zeros in a number that locks a decimal point are not significant. ▬▬▬ 美銀銀時 ☐☐ Right-end zeros in a number with a decimal point are significant. This is true whether the zeros occur before or ofter the decimal point. 237 has three significant figures. 1.897 has four significant figures. 39,004 has five significant figures. 5.02 has three significant figures. 0.008 has one significant figure. 0.000416 has three significant figures. 140 has two significant figures. 75,210 has four significant figures. 620.0 has four significant figures. 19.000 has five significant figures. For multiplication and division problems, the answer…

Which of the following is a best practice in weighing solid samples? A) Use weighing paper, a watch glass, a beaker, or some other container to measure mass of your solid samples. Do not return the mass settings to zero mark; let the next user tare it for you. For different trials of an experiment, use multiple balances for your measurements. Place chemicals directly on the balance pan.

Please answer this question as fast as you can please and tahnk you. I will afterwards write an wonderful review on solving the question. Thank you. For each piece of glassware measure the density of water in triplicate (three times). Why repeat the procedure multiple times for each piece of glassware? Running the measurement in triplicate increases the precision of our results and reduces the impact of a single outlier result. The experiment would be too short if you only ran each trial once The first two trials act as practice, and the final trial will give you the true result. Running the measurement in triplicate increases the accuracy of our results and reduces the impact of a single outlier result.

You must enter the answer with one number pass the decimal. ** You perform a distillation of a certain liquid at two different pressures The first distillation was done on a day when the pressure was 760 mmHg. The boiling point (the range where we saw drips come over) is 365. This is in Kelvin. (This is the normal boiling point of that liquid) Then you connected the adapter to a vacuum. The liquid now boils at 348 Kelvin. The enthalpy of vaporization in kJ/mol is 29.1 Hint: Clausius Clapeyron equation In(P2/P1) =DHvap/R* (T2-T1)/(T2T1) or In(P2/P1) =DHvap/R* (1/T1 - 1/T2) R = 8.3145 J/mol K

[References] Use the References to access important values if needed for this question. Write each of the following numbers in exponential or scientific notation. Write each number to two decimal places with only one non- zero digit before the decimal point. Example: Use 1.20 × 104 not 0.120 × 10-³ or 12.0 × 10-5. 7640 0.000125 0.000844 257000 Submit Answer 4 Try Another Version 1 item attempt remaining Previous Next

It gives inacurate results For Wooden" sphere because wood haS the ability to absoro water (imbibition) Date For which object does the method of volume by displacement give an inaccurate result? Why? A4. Calculate the density of each object (use the volume by displacement determination of the volume for each object except the wooden sphere; for the wooden sphere use the volume calculated from the diameter). Show all work with units and record your answers in the table below to the correct number of significant figures and with proper units. pensitty=MassOF Substance VOIUME oF Substance Show work: Lead: 47.460905. 5SF IRON: 263:60955F ろろ。5 ML-るSF -니.2ML→25F =11.39/MLE119/ML %3D7.879/ML nkown sphere: 7.380g-05 4.2ML 2 golden nugget: 31.0094 *VolUMe OF WOoden Sphere: TS OFWOoden sph- ir=radius OF WOoden Sph. 8.99/ML 1.6ML2 %3D199/ML| Table 2: Density Results Object xx 27 CM3 bensity= 그9.170 g/ML=Ol0981 g/ML Calculated Density 119/ML 7.879/ML 0.698/ML 3.99/ML 199/ML lead sphere =113ML…

How will each of the following experimental errors influence the results of your calculated densities you reported? State whether the error will tend to make your density results too large, too small or unchanged. Explain why this would occur by identifying which measurements would be affected (high or low) and how this would affect the calculated density. Use the followingIn method 2, the metal cylinder you used had a number of air bubbles on its when immersed in the water

General Chemistry C OWLV2 | Online teaching and learning resource from C.. b My Questions [References] Use the References to access important values if needed for this questi A calculator is found to have a mass of 118 grams. Using unit analysis, show what the mass of this calculator is in pounds. Use one of the following to set up the conversion factor. 454 g = 1 lb = 16 oz 1 m = 39.4 in = 3.28 feet 2.54 cm = 1 in 1 km = 0.621 mile 1L = 1.06 qt 3.79 L = 1 gal (number) (unit) 118 grams x lb (number) (unit) Submit Answer Try Another Version 5 item attempts remaining Cengage Learning | Cengage Technical Support

O MEASUREMENT AND MATTER W start Page Predicting the units of the solution to a basic quantitative... A student sets up the following equation to solve a problem in solution stoichiometry. (The ? stands for a number the student is going to calculate.) Enter the units of the student's answer. 1 mL 0.59 mL - 3 10 x10 108.39 mol II

What is the maximum mass of pure titanium that could be extracted from 3.0 kg of ilmenite, a titanium ore with the chemical formula FeTiO,? Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number of significant digits. x10

part 1 Which of the following is a best practice in weighing solid samples?   Use weighing paper, a watch glass, a beaker, or some other container to measure mass of your solid samples.   Do not return the mass settings to zero mark; let the next user tare it for you.   Place chemicals directly on the balance pan.   For different trials of an experiment, use multiple balances for your measurements

Hello I've tried this question many times and cannot seem to get it. I submitted this question previously but the answer given (1.3x10^15) was incorrect. Any help would be appreciated!

Try Again Your answer is incorrect. • Part 1: Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations. • Part 2: Your answer is correct. Warning: you must write a decimal point in numbers with measurement uncertainty, even if there are no decimal places to show. A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 × 1020 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of raindrops? 30.0 x 10 ? How many moles of raindrops are in the Pacific Ocean? 24