CHM1045L_Exp_1_DATA_SHEET

The mass of 4.375 x 1016 molecules of compound with the molecular formula C3H9N is ______ g. Report your answer in scientific notation and to 3 s.f. For example, if your answer was 1.076 x 10-10 you would report it as 1.08e-10.

Katie heats her hydrate to remove the water and obtain the anhydrous cobalt (II) compound CoCl2. Her results are below. Complete Katie’s data table of experimental results.   Mass of dry crucible + lid 42.37 g Mass of dry crucible + lid + CoCl2 • 6H2O (hydrate) 44.88 g Mass of CoCl2 • 6H2O 2.51 g Mass of crucible + lid + CoCl2 (after heating) 43.79 g Mass of CoCl2 (anhydrous) g Mass of water removed g Molar mass of water 18.02 g/mol Molar mass of CoCl2 129.84 g/mol Moles of H2O mol Moles of CoCl2 mol Molar ratio of water to CoCl2 (experimental)   Molar ratio of water to CoCl2 (theoretical) 6.00 % error of the molar ratio %   Q4. What was the most likely source of error in Katie’s experiment?

5. Given your experience in mass determinations and with volumetric glassware, which factor used - mass or volume - is likely to be measurable with greater precision? in calculating the density Explain. red with greater

Determine the mass of the product from the following data.    Mass Aluminum Foil (g)      2.5415 Mass Filter Paper (g)      0.2777 Mass Filter Paper + Product (g)      35.6484 Mass Product (g)       Group of answer choices 35.3708 g  35.3705 g  35.3707 g  35.3709 g  35.3706 g

1. Determine the maximum mass of aspirin that can be made from the amount of salicylic acid you used. mass (salicylic acid) = 2.004 grams %3D 2. Determine the maximum mass of aspirin that can be made from the volume of acetic anhydride acid you used. Hint: you need the density of acetic anhydride. volume (acetic anhydride) = 4.872 mL 3. Indicate which of the above amounts represents the theoretical yield. 4. Find the actual amount of aspirin produced from the following data: mass aspirin and crucible = 3.216 g 0.942 g mass empty crucible = 5. Calculate the percent yield of your aspirin.

A chemist measures the amount of oxygen gas produced during an experiment. He finds that 6.63 g of oxygen gas is produced. Calculate the number of moles of oxygen gas produced. Round your answer to 3 significant digits. |mol x10 Check Esliglanation O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessiblly 12.39 P 4/7/202 80 F Cloudy DELL PgDn Delete PrtScr Insert F12 F10 F11 F8 F9 F7 Num Lock F5 F6 F4 F2 F3 Esc F1 Backspace & # $4 % 80 @ 4 5 1 T Y W E R Enter * 00

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

In the picture below, determine how many atoms with a radius of 37pm can fit into a 1.00" box. Canvas does not work well with scientific notation, so you should enter your number as a regular number (you might have lots of zeros, hint, hint). So if you found the answer was 6.36x106 atoms, then you would write 6360000. Hint: Do this as a conversion and start with 1.00 inch as your starting number. This problem seems much more complicated, but it is the same problem you have been doing, you just need to make the units match! r=37pm 1.00"

Part A- Determining Density and Using Density to Determine Volume or Mass Platinum, Pt, is one of the rarest metals. Worldwide annual production is only about 130 tons. Platinum has a density of 21.4 g/cm³. If thieves were to steal platinum from a bank using a small truck with a maximum payload of 900 lb, how many 1 L bars of the metal could they take? O 1 bars O 2 bars O 19 bars O 42 bars O 47 bars Submit Request Answer Provide Feedback

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q1 Given the data and information in the prompt, what percent of sand is in the original mixture with absolute error? You will submit your answer in three parts. For this question, what value do you get for the percent of sand? You only need to submit the value here since the sig figs and error will be entered in the next two questions. You do not need to include the % symbol with your answer.

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The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q2 Given the data and information in the prompt, how many sig figs is the percent of sand in the mixture reported with? Your answer should just be an integer value, such as "1."

Percentage Abundance. The element rubidium consists of two isotopes, one having an isotopic mass of 84.912 and the other having an isotopic mass of 86.920.  Determine the percentage abundance of the lighter isotope.  Record the answer to the correct number of significant figures. Show the numerical set-ups.  Include units and the correct number of significant figures in the set-up.

Calculate the number of atoms in 264. µg of cadmium. Be sure your answer has the correct number of significant figures. Note: Reference the SI prefixes and Fundamental constants table for additional information. Cd atoms 0 x10 X

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 =

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q3 Given the data and information in the prompt, what is the calculated absolute error on the percent of sand in the mixture? Enter the absolute error you calculated in the box below. You do not need to include the % symbol with your answer.

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 cm³ Cu 210 L X 1 kg 1L Submit 9 g Cu = 1000 g 1000 cm³ Next m 3 9,5 × 1021 atoms Cu A piece of copper has a volume 210 L. What is the mass of the sample, in units of kilograms? In the boxes above, enter the correct setup that would be used to solve this problem. < (2 of 3) Hide Hint - 1 g Cu 1 cm³= 1 mL.

3. carbon occurs in nature in the form of two isotopes: 12° and 130. Calculate the percentage of each isotope of carbon, knowing that the average atomic mass of carbon is 12.0115 u. Give the result to two decimal places.

Hi! So I need help with the questions below, I have a tough time trying to understand.

M Inbox ( x Precalc X A HOLID X Oluwa X Good ь Chemi X A fake X G spiral G the sar X X Micros X https://papers.xtremepape.rs/CAIE/IGCSE/Chemistry%20(0620)/0620_s05_qp_6.pdf The same mass of zinc was used each time. The volume of acid used was different each time. Use the syringe diagrams to record the volume of hydrogen produced each time in the table. Table of results volume of sulphuric acid/cm volume of syringe diagram hydrogen/cm3 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 15 10 20 30 40 50 60 70 80 20 10 20 30 40 50 60 70 80 25 10 20 30 40 50 60 70 80 30 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 35 40 10 20 30 40 50 60 70 80 ENG 23:09 O Type here to search 27°C US 21/04/2022

Number 7 and please explain

Class: Date: Hame: Introduction to the Mole Write the term used for a certain number of things. (If you don't know, look it up!) An example is shown below. Then answer the questions below. molecule x 12 x 13 X 20 x 6.02*1023 1 a dozen skulls 2 3. 4. Calculate the number of dozens for each of the questions below. Use the space below to show your work. 5. Three blind mice = 0.25 dozen blind mice 6. 272 bagels = dozen bagels Given: 3 mice 12 mice = 1 dozen mice 3 mice 1 dozen mice = 025 dozen mice 1 12 mice Calculate the number of moles for each of the questions below. Use the space on the right to show your work 7 1204 x 10 H, molecules 1 of 1

26 1 3. 12M.+ On → le+ 27 12M9 26 11NA 27 iiNa 11N. 27 13AL

Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you the substance is a pure substance or a mixture, if you can. • Sample A is 100. g of a coarse grey powder with a faint unpleasant smell. 15. g of the powder is put into a funnel lined with a sheet of thick paper. Distilled water is poured slowly over the powder. All of the powder disappears, and the water under the funnel turns a deep purple. • Sample B is a solid yellow cube with a total mass of 50.0 g. The cube is ground to a fine orange powder and added to a 500 mL beaker full of water. The beaker is stirred vigorously. Some of orange powder settles to the bottom of the beaker, and some rises to the top and floats on the water. When the powder at both the bottom and the top of the beaker is filtered out, dried, and weighed, the total mass is measured to be 50.1 g. pure substance Is sample A made from a pure substance or a mixture? If the description of the…

II. BOILING POINT ELEVATION: The temperature of a boiling 50 mL of distilled water in an Erlenmeyer flask with a small flame was taken to be 98°C. The bulb of the thermometer must not touch the bottom or sides of the Erlenmeyer flask. In another Erlenmeyer flask, 2.83 grams of urea is dissolved in 10 grams of distilled water. The solution was let to boil gently and its boiling point was recorded to be 101°C. DATA AND RESULTS: (Show all pertinent computations on the space provided if applicable. Answers with no computation will not be considered.) Mass of urea in grams Mass of water in grams Boiling point of distilled water in degrees Celsius Boiling point of urea solution in degrees Celsius Molecular weight of urea in g/mol (experimental) Molecular weight of urea in g/mol (calculated) Percent Error of Molecular weights of urea Change in boiling point SOLUTION/S:

Please answer question number 1 correctly with the correct answer. there is a picture of an example of a ''Dimensional analysis Format' below. please write out all work showing the math in dimensional analysis format.    Question 3: Calculate the molar mass of each of the following ionic Compounds:   A. KMnO4 B. Ca3(PO4)2

substances have a definite and unchanging chemical composition. Examples of substances are salt, water, baking soda, carbon dioxide and oxygen. They are substances because their composition is____.

Answers will vary depending on your particular sample. Keeping in mind that the SI unit for mass is kg, the approximate weight of a bar of chocolate is 1 x 10 kg. What is the approximate mass (using SI mass units) of a grain of sand? О5x 10-3 kg O2.0 x 10' kg O1 x 10° kg O1 x 10-' kg O1x 10-5 kg O 3 kg Submit

Chemistry written by hand.