Stoichiometry Test Preparation Worksheet Answers, Exercises of Chemistry

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Practice Sheet — Preparation for Stoichiometry Test Problems from Addison-Wesley Chemistry Fourth Edition Extra Practice Problems Worksheets 1. What mass of ammonia is necessary to react with 2.1 x 10° molecules of oxygen in the following equation? NH; + O; > H20 + NO» 4NH2+402 2 GH29 +4NO, S Ta eters ini x Fwwitts r 17-04 4 NH 35." DZK[O ne gecles tmol O2 ] mol NH 3 345M, 2. Calculate the volume of carbon dioxide produced when 250 g of pentane, CsH)2 burn. Assume the carbon dioxide is cooled to STP. GHi2 *50, -—> &3CO> + 4H. © 25G.CKH \ Oo G5 Fiz, \molGs tho es aii Co. _ 23). % AY OM asthe ) mol Gs Hy > Imol COs > 3S COe a: What mass of silver can be produced from 3.00 mol of copper and 3.85 mol of silver nitrate? Find LR => Pro Or ae calla Tage “USN Ay 4. Calculate the mass of water produced when 2.75 x 10” molecules of oxygen gas react with 4.20 x 10” molecules of hydrogen gas. Fined is == He CLt98 44.20/07 = woaceulerhyx [mettre , Zewte® ,(COgtLO - | 26th oO CF mewres BMwIt ~~ [mel HO 5. Calculate the percent yield when 24.8 g of propane (C;Hg) are burned in air to produce 15.0 grams of water vapor. (Hint: figure out the balanced eqn for the combustion reaction. ) : 3S £aC8 ZI+Ci StHe+fi\2 %,: @ 2B Tate ZS-BoabClzlmaittC) lmoiCi, HOnl, _ oe 9 eeegc * Got f= 2, |= Sh. 6. What is the actual amount of magnesium oxide that can be produced when carbon dioxide reacts with 42.8 g of magnesium metal? The percent yield for this reaction is 81.7%. 2Mg + CO, > 2MgO+C 12.$ qMaXlnel Moy Leal ,go3qMa? _ 3, coma .] —. Zero! Wy mp Moy? ts Kena Y4eld = B)'F (FLO aMe)= 53 ©aa©