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Southern New Hampshire University *

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101

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Chemistry

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Feb 20, 2024

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Web Assign 3-1

fi @ 0 @ webassign.net W@ Home £2d Home... v https:/... v https:/... m 1-2 We... (b) crocetin (a red pigment in crocus flowers), C20H2404 chemPad il 0 Help | XT[[e] [owex-]| i ergocalciferol (vitamin Dz)' C28H400 [Chemrad Oven) Peene [E2sH440 C_28H_440 | Correct. phytomenadione (vitamin K‘), C:HH%O2 [enempad @ Help ‘{x"ixni"l;“]’_] [Greekv] B IC_31H_460_2 |Correct. (e) astaxanthin (an orange pigment in salmon), C40H5204 |chemPag @ Help E(ulx“j-.[.—_fi.-] [orex~] TR e i Correct. = 3 ‘ Supporting Materials _| Periodic Table | Constants and | Supplemental Data

1. [5/5 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.1.P.010. ' MYNOTESJ ASK YOUR TEACHER A novel process for obtaining magnesium from sea water involves several reactions. Write a balanced chemical equation for each step of the process. (Use the lowest possible whole number coefficients. Include states-of-matter under the given conditions in your answer.) (a) The first step is the decomposition of solid calcium carbonate from seashells to form solid calcium oxide and gaseous carbon dioxide. [chemPad R 6;1;Ip pTl=l] (o) [caC0,4(s) = Ca0(s) + CO,(9) o] {CaC0_3(s)—> CaO(s) + CO_2(g) } Correct. (b) The second step is the formation of solid calcium hydroxide as the only product from the reaction of the solid calcium oxide with liquid water. ":hemPad W gHeﬂlP‘ XalX°| =2 |~ Greek v [C20(s) + H0(/) = Ca(OH);(5) ‘,]‘ Correct. (c) 1In the third step, calcium hydroxide (mixed with se.awater) reacts with dissol i i , €8 lved magnesium chloride to yiel i magnesium hydroxide and aqueous calcium chloride. b chemPad OHelp[ Kol X" |2~ | = | Ca(0H)(2q) + MgCiy(aq) ~ Mg(OH)(s) + CaCl,(ag)] | |correct. 1 (d) In the fourth step, solid ma lum hydrox dd rodu b gnesium hydroxide is a Ic] %0l : o o 4y led to an aqueous hydrochloric acid solution, producing dissolved [chempad Belel] [ Ma(oH), (s) + 2HCl(ag) — MgCly(aq) + 2H,0()| @ Help {Mg(OH)_2 (s) + 2HCl(aq) —> MgCi_2(aq) + 2H 20() I | Correct.

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e O L s e Submit Answer | 2. [3/4 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.2.P.014. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Indicate what type, or types, of reaction each of the following represents. (Select all that apply.) (a) KBrO,(s) — KBr(s) + 2 0,(9) 1 —— | acid-base | combustion double displacement neutralization oxidation-reduction precipitation single-displacement v {B) CHO() + 3 0,(g) — 2 CO,(g) + 3 H,0(g) acid-base combustion | * double displacement neutralization oxidation-reduction precipitation single-displacement v Z“(NO;‘Z("‘]) . H/S()Alaq) - Znsoa(s) +2 HNO’(aq) | acid-base | combustion double displacement neutralization | | oxidation-reduction |@ precipitation ‘ single-displacement v () AI(OH);(aq) + 3 HBr(aq) — AlBr,(aq) + 3 H,0()

v htbtps:/“.k | ' [11/11 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.2.P.020C. YNOTES' ASK YOUR TEACHER Identify the atoms that are oxidized and reduced, the change in oxidation state for each, and the oxidizing and reducing agents in the following equation. C,H,(9) +30,(9) =2 €0,(9) + 2 H,0(9) R T | C | oxidized v -2 v +4 8v | H | neither oxidized nor reduced B + 8v + Bv I 1; O | reduced 8v o ev -2 8v Oxidizing agent CH, 00, Supporting Materials =l Periodic Table = Constants and Factors | Supplemental Data Additional Materials ([ Section 4.2 Submit Answer 4. [14/14 Points] [ DETAILS ” PREVIOUS ANSWERS OSGENCHEM1 4.2.P.020D.

P "W“@vzwnﬂ‘m!”’N|’U"l‘ﬂmlVl!lll]’l[(l"!‘l[[l]ly{wHweufigmgmnmux<(<\v\lN\muvwn|m1vuwv’“m W@ Home 2% Home... v https:/... v https:f. m 3-1We... u Uploa..v 4 [14/14 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.2.P.020D. MY NOTES l ASK YOUR TEACHER Identify the atoms that are oxidized and reduced, the change in oxidation state for each, and the oxidizing and reducing agents in the following equation. Zn(s) + HISO‘(W) (i ZnSO‘(aq) + Hz(g) oxidized or reduced? nx::a::::;t:: il oxl::::,’:,:gu Zn | oxidized Bv 0 8v +2 8v H | reduced 8v + ev 0 ev s neither oxidized nor reduced B +6 8v 46 ev | o neither oxidized nor reduced @ -2 8v -2 8v Oxidizing agent Zn O H,S0, | —J Periodic Table 2 Constants and 1 Supplemental Data Factors Additional Materials 2 section 4.2 Submit Answer | 5. [0/1 Points] ' DETAILq I PREVIOUS ANSWERS OSGENCHEM1 4.2.P.029.

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ﬂ @ 0 @ webassign.net v Home m Home... v https:/... v https:/... m 3-1We... Auaiuonal materiars [ Section 4.2 6. [1/1 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.3.P.050. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER What mass (in g) of silver oxide, Agzo, is required to produce 21.7 g of silver sulfadiazine, AgC, ;HgN, 10HgN,4S0,, from the reaction of silver oxide and sulfadiazine? 2.C,gH, (N, SO, + Ag,0 — 2 AgC, (HN,SO, + H,0 7.04 v 9 + ‘Supporting Materials £ Periodic Table (] Constants and | Supplemental Data Factors 7. [2/2 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.3.P.051. LMY NOTES LASK YOUR TEACHER PRACTICE ANOTHER Carborundum (silicon carbide), SiC, is a very hard material used as an abrasive on sandpaper and in other applications. is prepared by the reaction of pure sand, 5102, with carbon at high temperature. Carbon monoxide, CO, is the other product of this reaction. (a) Write the balanced equation for this reaction. (Omit states-of-matter from your answer. Use the lowest possible whole number coefficients. ) [chempad

e AR 3 e | & webassign.net i B Home.. W httpsi... W https:/... @ 3-1we.. W Home B s PREVIOUS ANSWERS OSGENCHEM1 4.3.P.051. 7. [2/2 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER SIC, is a very hard material used as an abrasive on sandpaper and in other applications. Carborundum (silicon carbide), with carbon at high temperature. Carbon monoxide, CO, is the other g | | is prepared by the reaction of pure sand, smz, product of this reaction. (a) Write the balanced equation for this reaction. (Omit states-of-matter from your answer. Use the lowest possible whole number coefficients.) [chemPad @Hep| 510, + 3C - SIC + 2CO Si0_2 + 3C->SiC + 2CO r e | Correct. (b) Calculate how many kilograms of SIO2 are required to produce 3.57 kg of SiC. 535 ¢ kg % | Supporting Materials L3 | | U Periodic Table I Constants and _| Supplemental Data | Factors 8. [1/ [1/1 Points) l DETAILS |l PREVIOUS ANSWERS | OSGENCHEM1 4.3.P.056 MY NOTES ‘ ASK YOUR TEACHERW LPRACTICE ANOTHER What volume (in L) of a 0.785 M hydr ric acid (HCI) solution can be prepared rom the reaction o of Wi .785 di | ydrochloric acid (HCl) ti fi h 24.1 : f 24.1 g of NaCl with. NaCl(s) + H,50,,(/) - HCl(g) + NaHSO,,(s) ! 0525 v L

i W L i " & W@ Home 2 Home v hitps: v https: 14 3-1We... !/ i . o) Supporting Materials [1] Periodic Table [] Constants and |l Supplemental Data Factors Additional Materials () Section 4.3 8. [1/1 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.3.P.056. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER | What volume (in L) of a 0.785 M hydrochloric acid (HCI) solution can be prepared from the reaction of 24.1 g of NaCl with an excess of sulfuric acid? NaCli(s) + H,SO (/) -+ HCI(g) + NaHSO ,(s) 0525 viL | + | Supporting Materials . L3 | i 2 Periodic Table 2] Constants and 1) Supplemental Data I Factors # 9. [2/2 Points) LDETAILS_] PREVIOUS ANSWERS | OSGENCHEM1 4.4.P.064, MY NOTES ASK YOUR TEACHER A sample of 0.54 g of carbon dioxide was of this reaction? was obtained by heating 1.42 g of calcium carbonate, What is the percent yield for LPRACT!CE ANOTHER CaCo,(s) — Cao(s) + €O,(s) @) a7 v %

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il nm"mlmmmwmmlf‘mmwfirr!*];z;,»mmymnm|ywa;rlizx1rwmz I e R i wéﬂ]ass“gn;neé I T W Home M Home... W https/.. W httpsi/... m 3-1We... 9. [2/2 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 4.4.P.064. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A sample of 0.54 g of carbon dioxide was obtained by heating 1.42 g of calcium carbonate. What is the percent yield for this reaction? CaCOl(s) — Ca0(s) + Coz(s) @ e7 v % | t | Supporting Materials | ) Periodic Table ] Constants and ] Supplemental Data Factors Additional Materials D section 4.4 10. [1/1 Points) l DETAILS PREVIOUS ANSWERS OSGELCHEMI 4.4.P.072. LMV NOTES ASK YOUR TEACHER PRACTICE ANOTHER i What is the limiting reactant when 1.72 g of lithium and 1.72 g of nitrogen combine to form lithium nitride, a component of advanced batteries, according to the following unbalanced ‘equation? UsN,~ LN 1O lithium nitrogen v Supporting Materials -] Periodic Table Constants and Factors _l Supplemental Data Additional Materials & Section 4.4

R S T TN U De e 1. [1/1 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 14.2.P.024. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The hydronium ion concentration in a sample of springwater is found to be 1.9x 1076 M at 15°C. What is the concentratio% (in M) of hydroxide ions in the springwater? (K, = 4.57x 1015 at this temperature.) @pEEs v M + Supporting Materials ] Periodic Table ] Constants and | Supplemental Data Factors i Additional Materials 2 Section 14.2 12. [1/1 Points] DETAILS PREVIOUS ANSWERS OSGENCHEM1 14.3.P.038. ol | | | L3 L My NOTE;\ uSK YOUR TEACHER PRACTICE ANOTHER Please use the values in the resources listed below instead of the textbook values. Which is the stronger acid, CEHSNHJ’ or H,CcH 0.2 (See the Acid and Base Dissociation Constants table. They are considered of equal strength if they are within 5% of each other. Assume K, =1.01x10714,) + CgHghH, O HyCeHeO They are of equal strength, v Supporting Materials Periodic Table Constants and Factors Supplemental Data Additional Materials & section 14.3

jan i ‘!mw M ome.. ' https:/... ) v’H{¥g§‘:”/”.‘.‘\.WWV 3-1We... W@ Home DUDMIt ANswer [6/6 Points] \ DETAILS \ PREVIOUS ANSWERS lY NOTES \ ‘ ASK YOUR TEACHER PRACTICE ANOTHER ’; ‘ Please use the values in the resources listed below instead of the textbook values. % What is the conjugate acid of each of the following? What is the conjugate base of each? (Omit states-of-matter from your 4 1 E answer.) | ;' @) AsH, l | i [chempad ~ @tep| ; XalX°| = |2 |« Greekv L‘\SH: I ,I : e S | {‘Correct. Conjugate acid LchemPad OHe,l?, [xolxﬂl_.l,—:lo—J F}reekvl ‘ ‘ fasH,” ’i | |AsH_2*- “‘ 1 B X ‘ Conjugate base (b) HN,* i [chempad ,,7,0,'““,1 o] o) . 4 H_6N_2/+2 Conjugate acid HaN2 Correct Conjugate base (©) H,s

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