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Chapter 4: Q4.90P (page 181)
Balance each of the following redox reactions and classify it as a combination, decomposition, or displacement reaction:
The classification of the given reactions are:
(a) Displacement reaction
(b) Displacement reaction
(c) Combination reaction
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Identify the oxidizing agent and the reducing agent in the following reaction, and explain your answer:
A mixture of KClO3 and KCl with a mass of 0.950 g was heated to produce O2. After heating, the mass of residue was 0.700g. Assuming all the KClO3 decomposed to KCl and O2, calculate the mass percent of KClO3 in the original mixture.
Many important compounds in the chemical industry are derivatives of ethylene . Two of them are acrylonitrile and methyl methacrylate.
Complete the Lewis structures for these molecules, showing all lone pairs. Give approximate values for bond angles a through f, and give the hybridization of all carbon atoms. In acrylonitrile and methyl methacrylate indicate which atoms in each molecule must lie in the same plane. How many s bonds and how many p bonds are there in acrylonitrile and methyl methacrylate?
The precipitation reaction between 25.0 mL of a solution containing a cation (purple) and 35.0 mL of a solution containing an anion (green) is depicted below (with ions shown as spheres and solvent molecules omitted for clarity).
(a) Given the following choices of reactants, write balanced total ionic and net ionic equations that best represent the reaction:
(1) KNO3(aq) + CuCl2(aq)
(2) NaClO4(aq) + CaCl2(aq)
(3) Li2SO4(aq) + AgNO3(aq)
(4) NH4Br(aq) + Pb (CH3COO)2(aq)
(b) If each sphere represents 2.5 x 10-3 mol of ion, find the total number of ions present.
(c) What is the mass of solid formed?
Question: In a car engine, gasoline (represented by C8H18) does not burn completely, and some CO, a toxic pollutant, forms along with CO2 and H2O. If 5.0% of the gasoline forms CO:
(a) What is the ratio of CO2 to CO molecules in the exhaust?
(b) What is the mass ratio of CO2 to CO?
(c) What percentage of the gasoline must form CO for the mass ratio of CO2 to CO to be exactly 1/1?
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