Homework Help Question & Answers

CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH...


CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH solution would react completely with
7. Which one of the following salts is INSOLUBLE in water? a) M S04 b) KNO, c) AgBr d) FCI e) NaBr 8. Two solutions are poure
14. Which of the following combinations of quantum numbers (n. 1, m.m.) would not be possible for an electron in an atom? a)
21. Which of the following is not a redox reaction? a) PC (1) + 3 H.OT) -> 3 HClaq) +H PO/(aq) b) Fe (s) + 3 CO(g) 2 Foſs) +
26. Suppose 20.0 grams of sodium metal and 20.0 grams of oxygen gas are reacted in a closed vessel and the reaction proceeds
28. Calculate the frequency of light having a wavelength of 550 nm? (speed of light-3.00 x 10 ms) 29. An atom emits photons o
CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH solution would react completely with 25.8 ml. of 0.198 M HCl according to the following cquation? HCI+KOH --->KCI+H.O a) 86.4 ml. b) 25.7 ml. c) 38.7 ml d) 17.2 ml. 2. Which one of the following is a strong soluble base? a) Ni(OH): b) Mg(OH): c) RLOH d) ChOH) c) Fe(OH) 3. Which one of the following is a strong acid? a) HF b) HNO, c) CHCOOH d) H.SO c) H.CO 4. What volume of 0.132 M KOH solution would react completely with 25.8 ml of 0.198 M HCl according to the following cquation? HCI + KOH --->KCI+H:0 a) 86.4 ml b) 25.7 ml. c) 38.7 ml d) 17.2 ml 5. In the decomposition of KCIO, 2.0 grams of KCIOs are reacted and 1.0 gram of KCl is actually collected in the experiment after the reaction is over. What is the % yield of this reaction? 2KCIO3 --->2KCI +30 a) 82.2% b) 50% c) 100% d) 75% e) 43% 6. What is the net ionic equation for the following formula equation? Cu(NOxaq) +H-S(aq) --- CuS(s) + 2HNO3(aq) a) C -HS-> CuS-2H b) Cur + 2NO+HS -> Cus+ 2H+ 2NO, c) C 2H'S - CuS-2H d) Curs Cus
7. Which one of the following salts is INSOLUBLE in water? a) M S04 b) KNO, c) AgBr d) FCI e) NaBr 8. Two solutions are poured together. Which mixture of solutions produces a precipitate? a) a solution of Na S and a solution Cu(NO3)2 b) a solution of NaPO, and a solution of KC c) a solution of KNO, and a solution of FeCl3 d) none of these produce a precipitate 9. Which of the following is the correct net ionic equation for the neutralization of HCI with KOH in aqueous solution? a) H(aq) + OH(aq) -> H.O(I) b) HCl(aq) + KOH(aq) --> KCl(aq) +H0 c) H(aq) + Cl(aq) + (aq) + OH(aq) -> K (aq) + Claq) + H:0 d) H(aq) + KOH(aq) -> K(aq) + H:0 10. What is the net ionic cquation for the following formula unit equation? Cu(NO3(aq) + H S(aq) --> CuS(s) + 2 HNO3(aq) a) Cu (aq) + H S(aq) --> CuS(s) + 2 H(aq) b) Cu (aq) + (aq) --> CuS(s) c) Cu(aq) + 2 H(aq) + (aq) -> CUS(s) + 2 H(aq) d) (Cu(aq) + 2NO3(aq)] +H S(aq) > Cus(s) +2 [H(aq) + 2NO, (aq)] e) Cu (aq) + 2 NO; aq) + 2 H(aq) + (aq)-> CuS(s) + 2 H(aq) + 2NO3(aq) 11. In which of the following equations is iron being REDUCED? a) 2Fe:O:(s) + 3H --> 4Fcs) +3 HO b) FeCl(aq) + 3NaOH(aq) ---> Fe(OH) (s)+ 3H-0 c) 2Fe(s) + 6HCl(aq) ---> 2FcCl(aq)+ 3H2(g) d) 4Fe(s) + 30, 2Fe: 0 e) Iron is not being reduced in any of these 12. What is the reducing agent in the following reaction? Cu(s) + 4 H(aq) + SO?"(aq) -> Cr" (aq) + 2 H2O(l) + SO:(8) a) Cub) c) S0, d) Cue) S02 13. Rank the following types of radiation from highest energy to lowest: ultraviolet/visible / X-ray/ microwave/infrared a) X-ray, ultraviolet, microwave, infrared, visible b) ultraviolet, X-ray, visible, infrared, microwave c) infrared, microwave, ultraviolet, visible, xray d) X-ray, ultraviolet, infrared, visible, microwave e) x-ray, ultraviolet, visible, infrared, microwave
14. Which of the following combinations of quantum numbers (n. 1, m.m.) would not be possible for an electron in an atom? a) (1.0.0, 1/2) b) (3.2.-1.-1/2) c) (4.4.1. 1/2) d) (2, 1, 1.-1/2) c) (6.1,-1,12) 15. What is the electron configuration of silicon, Si? a) 1s 2s 2p 3s 3p b) 1s 2s 2p 3s 3p c) Islp2s 2p d) isip 2s 2p e) 1s 2s 2p 24 16. Which of the following clectron configurations is INCORRECT? a) Ca, 1s 2s 2p 3s 3p 4 b) Br, 1s 2s 2p 3s 3p 43d4p c) O, 1s 2s 2p d) Cr, 1s 2s 2p 3s 3p 3d 4s! c) all are correct 17. Which is the following is an INCORRECT electron configuration? a) Ti-[Ar] 43 b) S-(Ne2s 2p c) L-lss" d) C = [He]2s 2p 18. Identify the INCORRECT statement below: a) The total number of electrons required to fill the n=1 level is 2. b) The total number of electrons that can have n-2 in a many-electron atom is 8. c) The total number of electrons that can occupy an atomic orbital is 2. d) The total number of electrons that can fit in the 3d sublevel is 5. level is 19. The total number of electrons that can be accommodated in the a) 18 b) SO c) 8 d) 2 c) 32 20. A 4.628 g sample of an oxide of iron was found to contain 3.348 g of iron and 1.280 g of oxygen. What is the simplest formula for this compound? a) Feb b) Fe.O c) Fe:04 d) FeO, e) none of these answers
21. Which of the following is not a redox reaction? a) PC (1) + 3 H.OT) -> 3 HClaq) +H PO/(aq) b) Fe (s) + 3 CO(g) 2 Foſs) + 300 (8) c) CCO:(s) + 2 HCIO.(aq)- C CIO ) 00:(9) +H.0(0) 22. What's the oxidation number of the specified clement in the following compounds: In MnO, the oxidation number of Mnis In CO, the oxidation number of Cis In H,CrO the oxidation number of Cris 23. Balance the following reaction : Sno. NF, -> SnF: + NO, CH4 + 0, -> CO2 + HẠO NH + O -> NO + HẠO P+ Cu Cu + H:10 (in acidic solution) Show calculation for the following problems: 24. In an experiment, 0.450 moles of NaCl are dissolved in 95.0 ml of water. Calculate the molarity of the NaCl solution 25. A sample of an oxide of nitrogen is found to contain 30.4% nitrogen. What is its simplest formula?
26. Suppose 20.0 grams of sodium metal and 20.0 grams of oxygen gas are reacted in a closed vessel and the reaction proceeds to completion to produce Na O with no other products. Which reactant is the limiting reagent, and how much of the reagent in excess will be left over? 2CI+ 30 27. When 5.00 g of KCIO, is heated it decomposes according to the cquation: 2KCIO, a) Calculate the theoretical yield of oxygen. b) Give the yield if 1.78 g of is produced. c) How much would be produced if the percentage yield was 78.5%?
28. Calculate the frequency of light having a wavelength of 550 nm? (speed of light-3.00 x 10 ms) 29. An atom emits photons of light having energies of 3.00 x 10". What is the wavelength of the light in nanometers? (speed of light-3.00 x 10m's 1 joule 1 kg m /s: Planck's constant -6,63 x 10 s)
0 0
Add a comment
Answer #1

1) The volume of KOH is calculated:

Vb = Ca * Va / Cb = 0.198 M * 25.8 mL / 0.132 M = 38.7 mL

2) Soluble hydroxide is Mg (OH) 2.

3) The strong acid is HNO3.

4) The volume of KOH is calculated:

Vb = Ca * Va / Cb = 0.198 M * 25.8 mL / 0.132 M = 38.7 mL

5) The theoretical grams of KCl are calculated:

g theoretical KCl = 2 g KClO3 * (1 mol KClO3 / 122.6 g) * (2 mol KCl / 2 mol KClO3) * (74.6 g KCl / 1 mol) = 1.22 g KCl

The percentage is calculated:

% KCl = 1 g * 100 / 1.22 g = 82.2%

If you liked the answer, please rate it in a positive way, you would help me a lot, thank you.

Add a comment
Know the answer?
Add Answer to:
CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coin

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • answer all please 11 Rank the following types of electromagnetic radiation from shortest wavelength to longest...

    answer all please 11 Rank the following types of electromagnetic radiation from shortest wavelength to longest wavelength Visible, ultraviolet, microwave, infrared, x-ray A X-ray visible ultraviolet <infrared <microwave B X-ray ultraviolet visible <microwave <infrared CX-ray ultraviolet < visible <infrared < microwave D. infrared microwave <ultraviolet visible <X-ray E microwave <infrared <ultraviolet < visible <X-ray 12. What is the energy of a photo of yellow light whose wavelength is 589 nm? A 3.38 x 10-19 B 3.38 x 10-10 C. 1.77...

  • need help with all ... 10. Calculate the wavelength of the spectral line in the comission...

    need help with all ... 10. Calculate the wavelength of the spectral line in the comission spectrum of hydrogen for which land 3. 277 mm b. 103 mm c. 345 mm d. 397 mm 11. For the wavelength emitted by hydrogen above question 10). what region of the electromagnetic spectrum does this photos belong to? Infrared b. Visible c. Ultraviolet d. X-Ray Radio waves 12. Magnesium forma m a mic ion which has the clectronic configuration of a moble as...

  • Sectn anwering these questions, show all your work in your blue book. 23 The first step...

    Sectn anwering these questions, show all your work in your blue book. 23 The first step in the Ostwald process for producing nitric acid is the reaction of 175g of ammonia with 175. g of oxygen gas yields 101. g of nitric oxide (NO), whs eeS04e)4NOR)+ 6M,Ole) he percent yield of this reaction? 24 24.5 mL ofa 0.1050 M Na CO, solution is added to 75.5.0 mL of 0.1250 M NaCl. What is the concentration of sodium lon in the...

  • Hi could you please provide detailed workings for this question? thanks! Questions 1 & 2 refer to the solubility of...

    Hi could you please provide detailed workings for this question? thanks! Questions 1 & 2 refer to the solubility of lead chromate, PbCr04: PbCrO4(s) = Pb2+(aq) + Cro4? (aq) 1. The Ksp for PbCrO4 is 2.0 x 10-16 at 25 °C. What is the solubility of PbCr04 in mol L´?? a) 1.4 x 10-8 b) 2.8 x 10-8 c)2.0 x 10-16 d) 7.1 x 107 e) 5.0 x 1015 2. If 5.0 mL of 1.0 x 10-M Pb(NO3)2 is added...

  • 10. Based on Periodic Table positions, only this set has two elements that would have similar...

    10. Based on Periodic Table positions, only this set has two elements that would have similar chemical properties: A. 11 Na, 12Mg. sXe, ssCs B. 13A, 14S, SP. As C. 13A, 18K, Ge, Sn. D. SF, Zr, son, sal 11. The IUPAC name of Ba(CIO) is A. Barium chloride B. Barium chlorite C. Barium perchlorate D. Barium chlorate 12. The correct order of increasing effective nuclear charge is AK <Mg <P <NO B. Mg <K<P <NO C.O <N<P < Mg...

  • 1s 2s 2p 3s*3p 4s 3d"4p 5s4d? 17. Which ion with a +1 charge has the electron configuration 1s 2s 2p 3s 3p 3d 4s 4p...

    1s 2s 2p 3s*3p 4s 3d"4p 5s4d? 17. Which ion with a +1 charge has the electron configuration 1s 2s 2p 3s 3p 3d 4s 4p? Which ion with a -2 charge has this configuration? 18. Which of the following atoms contains only three valence electrons: Li, B, N, F, Ne? 19. Circle the atoms with two unpaired electrons. (a) Mg (b) Si (c) S 20. Place the following in order of increasing atomic radius. As 0 Br A) As...

  • Identify the elements denoted by the electron configurations shown below: 1) 1822s22p3s 3p 4s23d5 (0.5 pts)...

    Identify the elements denoted by the electron configurations shown below: 1) 1822s22p3s 3p 4s23d5 (0.5 pts) 2) 1s 2s 2p 3s 3p 4s23d104p (0.5 pts) 3) [Xe] 6s24f45d8 (0.5 pts) 4) Fill in the orbital diagram below for the element you identified in #1. (0.5 pts) 5) Determine which of the molecules below contain polar covalent bonds AND use the appropriate symbols to represent the positive and negative poles. (1 pt) a) H-Br b) 1 c) H-O-H d) NF: 6)...

  • please solve what you can and show your work. I'm not really good in chemistry??‍♀️ Home...

    please solve what you can and show your work. I'm not really good in chemistry??‍♀️ Home assignment: Chapter 4: Aqueous Reactions and Solution Stoichiometry 1) Of the species below, only is not an electrolyte. A) HCI B) Rb2804 C) Ar D) KOH E) NaCI 2) Aqueous potassium chloride will react with which one of the following in an exchange (metathesis) reaction? A) calcium nitrate B) sodium bromide C) lead nitrate D) barium nitrate E) sodium chloride 3) When aqueous solutions...

  • 33. 20.0 mL of 0.200 M H,SO, is titrated with 0.100 M NaOH. What volume of...

    33. 20.0 mL of 0.200 M H,SO, is titrated with 0.100 M NaOH. What volume of 0.100 M NaOH is required to neutralize the acid? Na SO, (aq) + H,SO, (aq) + 2NaOH(aq) 2 H 0(1) A. 10.0 mL B. 20.0 mL C. 40.0 mL D. 80.0 mL How many nitrogen atoms are there in 4.0 moles of trinitrotoluene (TNT), C,H,(NO2),? A. 12 B. 2.0 C. 1.8 x 1014 D. 7.2 x 1024 E. 6.022 x 1023 31. A sample...

  • What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an...

    What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an amine e. no reaction c. an aldehyde Which of the following combinations will react spontaneously? A. 12 + Cu2+ B. Pb2+ + Ag C. Zn2+ + Mg D. Sn2+ + Ni2+ The general formula for a cycloalkane can be represented by which of the following? a. C,H, C. CH b. C.H2n+2 d. C.H21-2 In a certain reaction AH =-136 kJ and E, = 96...

Free Homework App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.