CHEM 1201 : PRIYA EXAM 1 KEY

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azuremammoth471

15 Mar 2019

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3 a t o m s m o l o r l m o e c u e s m o l l w a y. 5 i p o n t s e a c h. 1 i p r o p e r. 9 n u m b e r i n. 1 s e c t i o n. 12. 75 1. 3621 = _______: c6h6o2, c2h6so, h2o2, h2p4o6, c6h6. Answer: b: calculate the percentage by mass of oxygen in pb(no3)2, 9. 7, 14. 5, 19. 3, 29. 0, 33. 4. Answer: d: the correct answer (reported to the proper number of significant figures) to the following is ________, 17. 367, 17. 40, 17. 37, 17. 4, 17. 0. Answer: d: the correct name for hclo3 is ________, hydrochloric acid, perchloric acid, chloric acid, chlorous acid, hydrochlorous acid. Answer: c: which species below is the sulfate ion, cn, so42, oh, so32, none of the above.

Related Questions

Open a Word file to prepare this assignment. You will submit that file for your answer. Format the file so that the entries are all double-spaced, using hanging indentation and alphabetical order. You need to include italics and the proper punctuation. You will NOT number your entries.

Prepare a âWorks Citedâ page using the following works. Remember to alphabetize your list, italicize titles of books, put quotation marks around essay and article titles, double space within and between entries, and indent the second and subsequent lines five spaces.

1. The book By a Womanâs Hand: A Guide to Mystery Fiction by Women by Jean Swanson and Dean James published by Berkley Books in 1994.

2. The Foreword by Carl Sagan in the book Chemistry Imagined: Reflections on Science by Roald Hoffman and Vivian Torrence, published by the Smithsonian Institution Press in 1993.

3. The reprint of Eliza Haywoodâs 1751 novel The History of Miss Betsy Thoughtless in the series Mothers of the Novel, published by Pandora Press in 1986.

4. Personal letter to you (author) from Bill Clinton dated February 12, 2007.

5. Telephone interview with Tom Hanks on April 23, 2007.

6. George Orwellâs essay Shooting an Elephant on pages 1â10 of his book Shooting an Elephant and Other Essays, published by Harcourt Brace Jovanovich Publishers, Incorporated, in 1946.

7. John Davidsonâs article Menace to Society on pages 38 and 39 of the February 22, 2007, issue of Rolling Stone.

8. An unsigned article entitled Passion for Fashion on pages 37 and 38 of the November 4, 2007, issue of The New Yorker magazine.

9. An article by Patrice Hanson entitled The Aesthetics of Humour [sic] on pages 91 to 105, volume 92, Summer 2007 the journal The Dickensian.

[Note: Use sic to note any unusual spelling, discrepancy, or error, as in this case, where the British spelling is used. Place sic in brackets immediately after the word.]

10. The World Wide Web site by Andrew Taylor entitled Andrew Taylor, located at http://www.thenet.co.uk/~hickafric/ataylor1.html, March 30, 2007.

[Follow this model: Authorâs Last Name, First Name. Title of Website. Day Mo. Year, the URL without http://.]

GRAPHING EXERCISE #1

Graph the following data on one graph using Excel.

The following data was obtained in a lab exercise comparing temperature and gas pressure. The quantity and the volume of the gas were constant.

Temperature in ÂºC	Pressure in mm Hg
100	1174
73	1079
52	1020
25	949
0	861
-30	758
-48	700
-79	601
-94	566
-100	500

Plotting Graphs Using Excel

1. Click on the Excel icon. A series of rows and columns will appear.

Column A corresponds to the x-axis and Column B corresponds to the y-axis.

Enter the values for the x- and y- axes in columns A and B, respectively.

Position the cursor on the first cell, click and hold down the left mouse button and highlight all the values of columns A and B you have entered.

Click on the chart wizard (an icon that looks like a bar graph).

Click on scatter, next, and then click on the second sub choice. Click on next.

Click on next.

Your graph should show up on the screen. Click on next.

Click on chart title. Type in the title of your graph followed âby your nameâ. Label the x- and y-axes by placing a name with units in the space given for Category x and Value y.

Click on gridlines. Click on minor gridlines for both the x- and y-axes. Click on next.

You are given a choice between saving as a new sheet or saving in the current sheet. Saving as a new sheet will produce a larger picture of the graph, while saving within the current sheet allows for both the data sheet and graph to be printed on the same page. Click as a new sheet and the click finish.

If there is a lot of empty space on your graph, you need to adjust the scale on the x- and y-axes. To do this, double click on the axis you wish to adjust. The number that you will be changing appears in the âminimumâ box. (Note: the value at the origin does not necessarily need to be zero.

To print the graph, click on file and then click on print.

GRAPHING EXERCISE #2

Use this data in the following exercises.

Time, min Mass, g Time, min Mass,g

0.0 8.860 6.0 8.765

1.0 8.844 7.0 8.748

2.0 8.828 8.0 8.734

3.0 8.814 9.0 8.719

4.0 8.796 10.0 8.703

5.0 8.782

1. Using Excel, graph the time and mass data as in #1. Using the linear regression feature on excel, determine the equation of a line and show that equation on your graph.

2. Answer the following questions using the graph you have created above.

What is the independent variable?

What item is plotted on the abscissa?

What would be the mass of acetone in grams at a time of 12 minutes?

What would be the mass of acetone in grams at a time of 4.6 minutes? Show two ways to find this value.

HERE IS HOW THIS IS GOING TO WORK! IF YOU ANSWER THE QUESTIONS IWILL GIVE YOU THE 3K POINTS + MORE AFTER I REPOST IT.

2. The amount of heat involved in the synthesis of 1 mole of acompound from its elements, with all substances in their standardstates at 25*C, is called _________.

3. What is a valid unit for specific heat?

4. Use Hess's Law to find the heat of reaction in the examplebelow.

N2O4 (g) ----> 2NO2 (g)

Given that:

N2O4 (g) ----> N2 (g) + 2O2 (g) (Delta H =-9.7kJ)

2NO2 (g) ----> 2O2(g) + N2(g) ( Delta H= -67.7kJ)

5. Use Hess's Law to find the heat of reaction in the examplebelow. (Example doesn't exist btw.)

6. (Delta H) for the formation of rust (Fe2O3) is -826 kJ/mol. Howmuch energy is involved in the formation of 5 grams ofrust?

7. How many kilocalories of heat are required to raise thetemperature of 50g of aluminum from -5*C to 35*C? (Specific heat ofAluminum = 0.21 cal/g*C)

8.Calculate the (Delta H) for this reaction:

Zn(s) + Cu (2+ ion)(aq) ---> Zn(2+) + Cu(s)

(Delta H) for Cu(2+) = +64.4 kJ/Mol; (Delta H) for Zn(2+) = -152.4kJ/mol

9. The following equation shows the reaction that occurs whennitroglycerine explodes.

4C3H5O9N3 ----> 12CO2 + 6N2 + O2 +10H2O + 1725 Kcal

Is this reaction exothermic , endothermic, a combustion reaction ,or a combination reaction?

10. What does it mean for ammonia, (NH3) to have a (Delta H f) =-46 kJ/mol?

(for example: Define heat of formation. What does a negative heatof formation mean? what do the units of kJ/mol mean?)

11. What is the maximum amount of KCl that can dissolve in 500g ofwater?

(solubility of KCl is 34 g/ 100g of water at 20*C)

12.List the ways(operations) that can help make a substancedissolve faster in a solvent?

13. If a crystal added to an aqueous solution causes many particlesto come out of solution, the original solution was (saturate,unsaturated, supersaturated).

14. What is the number of moles of solute in 165 mL of a 0.82 Msolution?

15. What mass of NaCl is needed to make 350 mL of a 1.00 Msolution?

16. Colligative properties depend upon...

17. If one mole of each of these solutes in added to the sameamount of water, which solution has the highest boiling point?(glucose, aluminum sulfate, magnesium acetate, copper (I)chloride)

18. When an acid reacts with a base, what compounds areformed?

19. If the [H+] in a solution is 1x10^(-13) mol/L, what is the[OH-]?

20. If the [OH-] = 1x10^-6 mol/L, what is the pH of thesolution?

21. For a solution to be considered acidic what must be thehydrogen-ion concentration?

22. Which of the following represents a Bronsted-Lowry conjugateacid-base pair?

a) SO3(2-) and SO2 b) CO3(2-) and CO c) H3O and H2 d) NH4(+) and NH3

23. With solutions of "strong" acids and "strong" bases, the word"strong" refers to ...

24. What are the products of Al(OH)3 + H2CO3?

25.What is the concentration of hydrochloric acid if 5.0 mL of acidis neutralized by 30.0 mL of 2.00M sodium hydroxide.

26. At equilibrium, what is the rate of production of reactantscompared with the rate of production of products?

27. What is the equilibrium constant for the following reaction2SO3 ---> 2SO2 + O2

28. How does an increase in pressure affect the following reaction?2SO3 (g) --> 2SO2(g) +O2(g)

29.What stresses would shift the reaction to the right?

2SO3(g) ==> 2SO2(g) + O2(g)

30. The Keq of a reaction 4.9 x 10^(-7). Are products or reactantsfavored at equilibrium?

31. In which of these systems is the entropy decreasing?

a) air escaping from a tire b) snow melting c) a gas condensing d) salt dissolving inwater

32. If an atom is reduced in a redox reaction, what must occur toanother atom in the system?

33. Identify the oxidizing agent in the following reaction: 2Na + S---> Na2S

34. What are transferred in an oxidation -reductionreaction?

35. Give the oxidation number for each atom in KMnO4.

36. Which atom has a change in oxidation number of +4 in thefollowing reaction?

K2Cr2O7 + H2O + S ----> KOH + Cr2O3 +SO2

37. What is the oxidation number of sulfur in each of the following:

a. SO3 c.SO2(2-)

b. Na2SO4 d. S2O4 (2-)

38.Fe(3+) ----> Fe represents oxidation, reduction, orhydrolysis?

39. When the half reactions Br2+ 2e- -----> 2Br- and Na---->e- + Na(+) are combined the balanced redox equation is_____________________ ( WRITE the BALANCED REDOX eq)

40. To balance the oxygen and hydrogen for a redox reaction thattakes place in basic solution, it is necessary to use whichsubstance?

41. What particle completes this nuclear equation? 55/25 Mn + 2/1 H====> _____ +2 1/0 n

42. The half-life of tungsten-182 (182/74 W) is 1.1x10^(17) years.How long would it take for a 376.2 kg sample to decay until only123.0 grams remain?

43. After 3 days, the quantity of certain radioisotope is reducedfrom 13.6 grams to 1.9 grams. Calculate the half-life of theisotope.

44. What is the name of the compound having the formulaC8H18.

45. What is the name of the following compound:

CH3---CH2----CH---CH2--C

I \

CH3 OH

46. What is an isomer? Give an isomer of hexane (C6H14) and drawit's structure.

47. What is the name of the hydrocarbons with double covalentbonds?

48. Draw the stucture for 3-methylbutanoic acid.

49. Draw the structure for methylbenzene?

50. What is the name of the following compound:

CH3----C-----CH3

CH3

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CHEM 1201 : PRIYA EXAM 1 KEY

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