CHM1045L_Exp_1_DATA_SHEET

How do I solve for the percent value? The sample data calculated the answers but I have no idea how they obtained the percent error values. Calculate sample data #1 with detailed steps.

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…

[Review Topics) [References) Use the References to access important values if needed for this question. How many picograms are there in one gram? Enter your answer in scientific notation. For example, enter 105 as 1 x 10°. pg Submit Answer Retry Entire Group 8 more group attempts remaining

Please help with question 6

Make a graph of the average mass vs. year. Make sure axes are labeled. Please please answer super fast please answer as fast as possible

See attached image. Calculate the moles and mass of acetylsalicylic acid in each tablet (molar mass = 180.16 g/mol).

7 Calculate the mass (in g) of oxygen in a 76.9 g sample of Ni(BrO4)2 (MM = 346). Report your answer to 3 significant figures. Type your answer.... Previous

Pictures has my question

Experimental data. Your data are shown in lines 1-5 that you measured in the lab. Fill in the table where there are gray boxes for your calculations. You are working to determine the percent water in Unknown C.                                                                                         Trial 1                          Trial 2     1. Mass of fired crucible and lid (g) 24.98 g 25.12 g 2. Mass of fired crucible, lid, and hydrated salt (g) 28.89 g 27.67 g 3. Mass of crucible, lid, and anhydrous salt (g)   27.29 g     26.64 g                                                                                           Trial 1    Trial 2 4. Mass of hydrated salt (g)      5. Mass of anhydrous salt (g)     6. Mass of water lost (g)     7. Percent by mass of water in hydrated salt (%)     8. Average percent water in hydrated salt (%)

STPKsYapxmOBQpqJ9sYHEQf udwLFoPO2ojmMGw/edit s Help Last edit was seconds ago B U A G O O- E E E E E E - E - E E 14.5 3 4 5 6 You are asked to perform an experiment to determine the density of square block below. In order to complete your calculations you will need to (AKS 1b, DOK1). Question options: 1. Use the electronic balance to determine the mass of the block. 2. Use water displacement to determine the volume of the block. bD 1. Use the electronic balance to determine mass. 2. Use ruler to measure the length, width, and height to determine volume. C= 1. Use a pipet to determine the mass of the block. 2. Use water displacement to determine to volume of the block. Pr Au 立

please answer

Please help with 7&8

Can you please solve #9,10,11  show all of your steps and explain how you do it, the second picture is my work I was trying to do but I don't know if my work is right. SHOW ALL YOUR WORK IN PICTURES! DO NOT TYPE IT. THank you !

Using dimentional analysis, find the volume of 7.50 g of aluminum. Use conversion factor.

A 0.611 gram sample of copper is carried through the steps of this experiment. At the completion of the last step, 0.427 grams of copper are recovered. What is the percent recovery of the copper metal? Give your answer in in decimal format. When entering units, use proper abbreviated units with proper capitalization.________  ______Answer   Units

Say you glued two samples together; a 5.00 g sample of acrylic with a density of 1.19 g/mL and a 2.35 g sample of Teflon (d = 2.22 g/mL). What is the density of the combined sample? Be careful here and remember the difference between intensive and extensive properties. • View Available Hint(s) 3.252 g/mL Submit Previous Answers

Pl6 please answer question correctly and show all work, thank you.

Use your graph equation to calculate the expected mass loss for your Epson salt sample, then  use percent error equation from the density lab to compare your actual mass lost and the value predicted from the equation.

Complete the table and answer the following questions.

Experiment 3: Determination of the Average Mass of a Penny  Number of pennies: 5 Mass of pennies (weighed together): 13.2 Mass of penny 1: 2.5 Mass of penny 2: 2.5 Mass of penny 3: 2.6 Mass of penny 4: 2.5 Mass of penny 5: 3.1 please help me with this part and show me all step  ??????? ???? ?? ? ?????=??? ?? ?ℎ? ?????????? ?????? ?? ?ℎ? ???? ???????/5  1. Total Mass of five pennies (weighed separately): 2. Average mass of a penny (using mass of five pennies weighed together)

Please don't provide handwritten solution .....

I need help calculating these.  Chemistry

View History Bookmarks Develop Window Help A east.cengagenow.com [References) 1 pt EXERCISE Unit Conversion 1 pt Drag conversion units onto the boxes in the equation to make conversions. Some boxes can be left empty. Click on a unit to remove it from its position. 1 pt 1 cm³ Cu 9 g Cu 9.5 x 1021 atoms Cu 1 g Cu 1 pt 1 kg 1000 g 1 cm = 1 mL 1 pt 1 L 1000 cm3 1 pt 1 pt 520 L x 1 pt 1 pt 1 pt A piece of copper has a volume 520 L. What is the mass of the sample, in units of grams? In the boxes above, enter the correct setup that would be used to solve this problem. 1 pt 1 pt Check Next (2 of 3) 1 pt 1 pt Submit Answer Try Another Version 2 item attempts remaining 1 pt

3. Imagine you performed this experiment at your own benchtop. You work hard to collect the data in the following table. Complete the calculations to fill in the rest of the table. Trial 1 Trial 2 Trial 3 Mass of Weighing Bottle & Sample (g) Mass of Weighing Bottle (g) 10.8732 9.0991 7.6855 10.7304 8.8761 7.5307 Mass of Sample (g) O.1428 0.223 15.2161 Mass of Filter 1.7121 1.9174 1.7305 Paper & AgCl (g) Mass of Filter 1.3322 1.3236 1.3210 Paper (g) Mass of AgCl 038 05938 04099 Moles of Cl (mol) Mass of CI' (g) Percent Cl 4. Calculate the average and the standard deviation of the three trials: Average Percent Cl %3D Standard deviation =