Question

question 4-5

should be indicated on the scantron. Answers in dicated on Exam will not be graded. 4.Use pencil for marking the answers on the scantron. 5. Apply significant figures as appropriate MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. AL 1) How many chloride ions are there in 7.50 mol of aluminum chloride? A1.35 1025 chloride lons 1) AIcl3 B) 3.00 chloride ions D) 4.52 1024 chloride lons C) 22.5 chloride lons 2.30.02 2) According to the following balanced reaction, how many moles of HNO3 are formed from 2.50 moles of NO2 if there is plenty of water present? 2) 3NO2) H20) -2 HNO3(a) NO) ZH No3 3 Nor + 2.s0 A) 2.50 moles NO 2 B) 7.50 moles NO C) 3.75 moles NO D) 0.834 moles NO .67 moles NO y 2.50 2.50x 2 HNO3 NO2 E) 1-67 1.6 3) Carbonic acid can form water and carbon dioxide upon heating (How much carbon dioxids is formed from 1.55 g of carbonic acid? 3) aix2+12xt+lek3 H2CO3 H20+CO2 29 o 29 Hz CO3 YDI.10 g E) 2.18 g C) 0.450g A) 5.33 g B) 1.55 g 4) 4) If the percent yield for the following reaction is 65.0 %, how many grams of KCIO3 are needed to 2:3 produce 4.00 g of 02? tot Imel o2 4.000 2 KCIO3() 2 KCI) 3 02() D) 15.7 g C) 35.3 g B) 6.63 g A) 10.2 g 5) Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s)+ H20)Ca(OH)2() A 1.00-g sample of CaO is reacted with 0.965 g of H20. How many grams of water remain after the reaction is complete? E) 0.0357 D) 0.644 C) 1.04 B) 0.00198 A) 0.00 1

Answer 1

♡ 2 kclong elesne tegy 2 noies of kuloz (2x183-55 gng) produces 3 horesch og (3*32 gng ? grs of Kulozi produced 4 ghs of Oz :. = 4x2x122.55 gng of Kulog .3x32 980-4 ans of Kelog 96 2. 10.212. one of kuloz for 100 t. yield 10.2 9H Sot Kulon for. 100 % yield for 65% gilld a) ? ghs of = 65x long Ang: () loe ons (376.63 915 Toke one 26.63 ghof Kalog

5) cao + is) roes of Mole H₂O calo!), ) cao = weight = ign [Irune = louet start 1. Test I 20.0178 rolez long 17.8 Mirales mules of Heo = weight - - 0.965 M Muit = .W 20.0536 poles (on 53-stutules among the Two Reactants cao hap leff writer of raes thus cao is the limiting Reagent Excess Reagent 56 ghs of Cao Requires 18 hs of Hao IgM of cao Requires ? GMs of H2O = xh gre of 4,0 = 0.321gng of to

. Excess anoont of H2O = (8-965-0.321) gh F 0.644 919 Ans: (1) 0.644 grs of Heo present in excess a nount...