Chapter 2 Review Questions

# Chapter 2 Review Questions - mass Strong heating drives off...

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2.27 The empirical formula of a gaseous fluorocarbon is CF 2. At a certain temperature and pressure, a 1-L volume holds 8.93 g of this fluorocarbon, whereas under the same conditions, the 1-L volume holds only 1.70 g gaseous fluorine (F 2 ). Determine the molecular formula of this compound. 2.37 Disilane (Si 2 H 6 ) is a gas that reacts with oxygen to give silica (SiO 2 ) AND WATER. Calculate The mass of silica that would form if 25.0 cm 3 disilane (with a density of 2.78 X 10 -3 g cm -3 ) reacted with excess oxygen. 2.41

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Potassium nitrate (KNO 3 ) is used as a fertilizer for certain crops. It is produced through the reaction 4 KCl + 4HNO 3 + O 2 4 KNO 3 + 2Cl 2 + 2H 2 O Calculate the minimum mass of KCl required to produce 567 g KNO 3 . What mass of Cl 2 will be generated as well? 2.53
A dark brown binary compound contains oxygen and a metal. It is 13.38 % oxygen by mass. Heating it moderately drives off some of the oxygen and gives a red binary compound that is 9.344% oxygen by

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Unformatted text preview: mass. Strong heating drives off more oxygen and gives still another binary compound, which is only 7.168% oxygen by mass. (a) Compute the mass of oxygen that is combined with 1.000g of the metal in each of these three oxides. (b) Assume that the empirical formula of the first compound is MO 2 (where M represents the metal). Give the empirical formulas of the second and third compounds. (c) Name the metal 2.65 In the Solvay process for producing sodium carbonate (Na 2 CO 3 ), following reactions occur in sequence: NH 3 + CO 2 + H 2 0 NH 4 HCO 3 NH 4 HCO 3 + NaCl NaHCO 3 + NH 4 Cl 2 Na HCO 3 + heat Na 2 CO 3 + H 2 0 + CO 2 How many metric tons of sodium carbonate would be produced per metric ton of NH3 if the process were 100 % efficient 91 metric ton = 1000 kg)?...
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Chapter 2 Review Questions - mass Strong heating drives off...

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