Report all your results by using significant figures and use dimensional analysis. A flammable gas contains only C, H, N, and Cl. The complete combustion of a 100.0 mg sample of this gas in excess oxygen produces 83.16 mL of CO2 and 73.30 mL of H20 vapor at STP. A separate analysis shows that the sample also contains 16.44 mg of Cl. (a) Determine the percentage of the composition of the substance. (b) Calculate its empirical formula. (c) If the

Report all your results by using significant figures and use dimensional analysis. A flammable gas contains only C, H, N, and Cl. The complete combustion of a 100.0 mg sample of this gas in excess oxygen produces 83.16 mL of CO2 and 73.30 mL of H20 vapor at STP. A separate analysis shows that the sample also contains 16.44 mg of Cl. (a) Determine the percentage of the composition of the substance. (b) Calculate its empirical formula. (c) If the

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter8: Gases

Section: Chapter Questions

Problem 155CP: Methane (CH4) gas flows into a combustion chamber at a rate of 200. L/min at 1.50 atm and ambient...

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97 Homes in rural areas where natural gas service is not available often rely on propane to fuel kitchen ranges. The propane is stored as a liquid, and the gas to be burned is produced as the liquid evaporates. Suppose an architect has hired you to consult on the choice of a propane tank for such a new home. The propane gas consumed in 1.0 hour by a typical range burner at high power would occupy roughly 165 L at 25°C and 1.0 atm, and the range chosen by the client will have six burners. If the tank under consideration holds 500.0 gallons of liquid propane, what is the minimum number of hours it would take for the range to consume an entire tankful of propane? The density of liquid propane is 0.5077 kg/L.
perform stoichiometric ca1cu1uions for reactions involving gases as reactants or products.
At the critical point for carbon dioxide, the substance is very far from being an ideal gas. Prove this statement by calculating the density of an ideal gas in g/cm3 at the conditions of the critical point and comparing it with the experimental value. Compute the experimental value from the fact that a mole of CO2 at its critical point occupies 94 cm3.
What is the value of FP for a sample of gas whose temperature is -33.0 C and volume is 0.0250 L? What temperature is required to change the volume to 66.9 cm3?
The gas in the discharge cell of a laser contains (in mole percent) 11% CO2, 5.3% N2, and 84% He. (a) What is the molar mass of this mixture? (b) Calculate the density of this gas mixture at 32C and 758 mm Hg. (c) What is the ratio of the density of this gas to that of air (MM=29.0g/mol)at the same conditions?
Methane (CH4) gas flows into a combustion chamber at a rate of 200. L/min at 1.50 atm and ambient temperature. Air is added to the chamber at 1.00 atm and the same temperature, and the gases are ignited. a. To ensure complete combustion of CH4 to CO2(g) and H2O(g), three times as much oxygen as is necessary is reacted. Assuming air is 21 mole percent O2 and 79 mole percent N2, calculate the flow rate of air necessary to deliver the required amount of oxygen. b. Under the conditions in part a, combustion of methane was not complete as a mixture of CO2(g) and CO(g) was produced. It was determined that 95.0% of the carbon in the exhaust gas was present in CO2. The remainder was present as carbon in CO. Calculate the composition of the exhaust gas in terms of mole fraction of CO, CO2, O2, N2, and H2O. Assume CH4 is completely reacted and N2 is unreacted.
Given that a sample of air is made up of nitrogen, oxygen, and argon in the mole fractions 0.78 N2, 0.21 O2, and 0.010 Ar, what is the density of air at standard temperature and pressure?
Environmentally conscious Susan has been toldthat a new electric car will only generate 6 ounces of green-house gases (GHG) per mile, but that a standard internalcombustion car is double that at 12 ounces per mile. However,the nature of electric cars is such that the new technology andelectric batteries generate 30,000 lbs. of GHG to manufactureand another 10,000 lbs. to recycle. A standard car generatesonly 14,000 lbs. of GHG to manufacture, and recycling withestablished technology is only 1,000 lbs. Susan is interested intaking a systems approach that considers the life-cycle impactof her decision. How many miles must she drive the electriccar for it to be the preferable decision in terms of reducinggreenhouse gases?
To evaluate the use of renewable resources, an experiment was carried out with rice hulls. After pyrolysis, the product gas analyzed 6.4% CO2, 0.1% O2, 39% CO, 51.8% H2, 0.6% CH4, and 2.1% N2. It entered a combustion chamber at 90 °F and a pressure of 35.0 in. Hg and was burned with 40% excess air (dry) at 70 °F and an atmospheric pressure of 29.4 in. Hg; 10% of the CO remains. a. How many cubic feet of air were supplied per cubic foot of entering gas? b. How many cubic feet of product gas were produced per cubic foot of entering gas if the exit gas was at 29.4 in. Hg and 400 °F?
A gaseous fuel contains by volume:CO2 = 2.6 % ,CO = 6 %, O2= O.6 % ,N2= 3.66 % ,H2= 48.0%CH4= 34 %, C2H4=5.2 %Calculate the minimum volume of air required for complete combustion of 100 m3 of the gas. If 50 % excess air is supplied, find the volume of each of the dry constituents of the flue gas.
Gypsum (plaster of Paris : CaSO,. 2H,0) is produced by the reaction of calcium carbonate and sulfuric acid. A certain lime stone analyzes: CaCO, 96.89 %; MgCO, 1.41 %; inerts 1.70 %. For 5 metric tons of limestone reacted completely, determine: a. kg of anhydrous gypsum (CaSO,) produced. b. kg of sulfuric acid solution (98 wt%) required.
At 273 K and 1 atm pressure, 1 mol of an ideal gas occupies 22.4 LIn which parts of the atmosphere would you expect gases to behave most ideally (ignoring any photochemical reactions)?

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