VI. AssessmentGiven the ions. Label them as monatomic ion, polyatomic ion, cation and/or anion. Use acheck mark () for your answer.PolyatomicionsMonatomicSymbolCationAnionionsEx. Sr2+1. Pb2+2. P3-3. Роз3-4. Se?-5. C2H3O26. Zr++7. NH++8. CN-9. О-210. SCN-11. Fes+12. H3O+13. C102-14. N3-15. Соз+

Monoatomic ions are ions in which single element is present. eg- Pb2+ , Na+ , Cl- Polyatomic ions…

ven the ions. Label them as monatomic ion, polyatomic ion, cation and/or anion. Use ieck mark (/) for your answer. Monatomic Polyatomic ions Symbol Cation Anion ions Ex. Sr2+ 1. Pb2+ 2. Рз- 3. PO33- 4. Se?- 5. C2H3O2 6. Zr** 7. NH++ 8. CN- 9. O2 10. SCN- 11. Fe3+ 12. H3O+ 13. C1Oг 14. N3- 15. Co3+

ven the ions. Label them as monatomic ion, polyatomic ion, cation and/or anion. Use ieck mark (/) for your answer. Monatomic Polyatomic ions Symbol Cation Anion ions Ex. Sr2+ 1. Pb2+ 2. Рз- 3. PO33- 4. Se?- 5. C2H3O2 6. Zr** 7. NH++ 8. CN- 9. O2 10. SCN- 11. Fe3+ 12. H3O+ 13. C1Oг 14. N3- 15. Co3+

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter2: Atoms Molecules And Ions

Section: Chapter Questions

Problem 29PS

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Am I right? Sample 1 2 3 Calculations for sample 1 Mass of aluminum dish 1.24g 1.26g 1.24g - Mass of aluminum dish + Epsom salt 1.70g 1.94g 1.80g - Epsom salt, original (hydrated) mass 0.46g 0.68g 0.56g 1.70g – 1.24g = 0.46g Mass of aluminum dish + Epsom salt after heating 1.42g 1.62g 1.61g Epsom salt, heated (dehydrated) mass 0.18g 0.36g 0.37g 1.42g- 1.24g = 0.18g Mass of water 0.28g 0.32g 0.19g 0.46g – 0.18g = 0.28g Moles of magnesium sulfate 0.0015mol 0.0030mol 0.0031mol 0.18g x (1mol/120.37g)= 0.0015mol Moles of water 0.016mol 0.018mol 0.011mol 0.28g x (1mol/18.02g) = 0.016mol Ratio of moles water: moles of magnesium sulfate 32:3 18:3 11:3.1 0.016 : 0.0015= 32:3 Average Ratio Knowing that magnesium sulfate is heptahydrate, what is the % error on the mass percentage of water? Show all calculations. --> percentage error: 30.43% 1)…
1. Sketch and label the main parts of the mass spectrometer. 2. Give detail description about how it works.
This exercise will lead you to verify that the average atomic mass of magnesium is 24.31 amu, based on the following information: isotope mass (amu) percent abundance 24Mg 23.985042 78.99% 25Mg 24.985837 10.00% 26Mg 25.982593 11.01% The average atomic mass is the weighted average of the atomic masses of all isotopes. What is the fractional abundance of 24Mg?
Scenario In an investigation, lab groups combine two compounds, as shown below. Based on the data collected from all lab groups, you realize that one group’s data was not possible. Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g) External Data Group Number Mass of Mg (g) Mass of HCl (g) Mass of MgCl2 (g) 1 5 15 20 2 5 15 17 3 5 15 21 4 5 15 20 5 5 15 19 Prompt Make a claim about which group’s data is not possible. Use evidence and scientific reasoning to support your claim. Include a rebuttal in your answer. Claim (1 sentence): ______________________________________________________________. Evidence 1 (2-3 sentences):…
In a reproduction of the Millikan oil-drop experiment, astudent obtains the following values for the charges onnine different oil droplets.6.563 × 10-19 C 13.13 × 10-19 C 19.71 × 10-19 C 8.204 × 10-19 C 16.48 × 10-19 C 22.89 × 10-19 C 11.50 × 10-19 C 18.08 × 10-19 C 26.18 × 10-19 C (a) Based on these data alone, what is your best estimateof the number of electrons on each of the above droplets? (Hint: Begin by considering differences in charges between adjacent data points, and see into what groups these are categorized.)(b) Based on these data alone, what is your best estimate of the charge on the electron?(c) Is it conceivable that the actual charge is half the charge you calculated in (b)? What evidence would help you decide one way or the other?
Atomic weights are not provided, but please use rounded-off values to the nearest whole number.(examples: 24.305, use "24"; 107.8682, use "108"; 1.00784, use "1"; 15.999, use "16") Add trailing zeros to complete your answer to the 3rd decimal place, if necessary. (examples: if your answer is "62.7", write it as 62.700; if your answer is "37.12", write it as 37.120if your answer is "123", write it as 123.000) 1. A 3.50-gram sample of Streptomycin powder was tested for its water content. If the water equivalence factor of the KF reagent was 4.6, what is the percentage water content of the sample if 9.2 ml of the KF reagent was used? 2. An analyst accurately weighed 5.351 grams of sample for ash-insoluble content using the dry method. The weight of the crucible containing the ash was 40.722 grams. If the sample was said to have 2.150% of insoluble ash, what is the weight of the tared crucible?
Atomic weights are not provided, but please use rounded-off values to the nearest whole number.(examples: 24.305, use "24"; 107.8682, use "108"; 1.00784, use "1"; 15.999, use "16") Add trailing zeros to complete your answer to the 3rd decimal place, if necessary. (examples: if your answer is "62.7", write it as 62.700; if your answer is "37.12", write it as 37.120if your answer is "123", write it as 123.000) 1. A 1.2-gram sample of lanolin was treated with Wij’s solution and excess potassium iodide solution. The liberated iodine reacted with 30 ml of 0.1 N sodium thiosulfate solution. If the iodine value was determined as 12.69, what is the volume used in blank titration? 2. A 500mg oil sample is taken from a conical flask and is dissolved in 50mL distilled alcohol. An indicator is added and is then titrated against 0.112N KOH until a slight pink color appears. It took 17.6mL of the titrant to reach the endpoint. What is the sample’s Acid Value?
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Determine the mass (in grams) of exactly 100 millionatoms of fluorine if the relative atomic mass of fluorine is18.998403 on a scale on which exactly 12 is the relativeatomic mass of 12C.
5. In a mass spectrum, the peak of greatest abundance is referred to as the_________________________. Relative abundance is the unit along the y-axis ina mass spectrum. What are the units on the x-axis? _____________________.
Q- Explain the instrumentation and working of mass spectrometer
Millikan determined the charge on the electron by studyingthe static charges on oil drops falling in an electricfield (Figure 2.5). A student carried out this experiment usingseveral oil drops for her measurements and calculated thecharges on the drops. She obtained the following data: Droplet Calculated Charge (C)A 1.60 x 10-19B 3.15 x 10-19C 4.81 x 10-19D 6.31 x10-19 (a) What is the significance of the fact that the droplets carrieddifferent charges? (b) What conclusion can the studentdraw from these data regarding the charge of the electron?(c) What value (and to how many significant figures) shouldshe report for the electronic charge?