Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
The 14C isotope, like all radioactive isotopes, decaysvia first order kinetics. It has a half life of 5730 years. Adocument believed to 2000 years old was analyzed and was determined that 84.4%
The Decomposition of SO2Cl2 is firstorder in SO2Cl2 and has a rate constant of1.42*10-4s-1 at a certain temperature. What is the half-life for this reaction?
A 0.8870 g sample of a mixture of NaCl and KCl is dissolved inwater and treated with excess AgNO3 to yield 1.822 g ofAgCl. Calculate the percent by mass of each compound in the mixture.
Suppose the insulating qualities of the wall of a house come mainly from a 3.5 inch layer of brick and an R-19 layer of insulation, as shown in Fig. 14-19.
To eliminate the safety hazard created from the first reaction(decomposition of sodium azide (NaN3) into sodium andnitrogen), the sodium produced is reacted with potassium nitrate toyield sodiu
Suppose the volume inside an airbag was fixed at 55 liters and temperature remained constant. What would be the new pressure inside the bag, as now additional nitrogen was present?
The pressure of 5.0 L of an ideal gasin a flexible container is decreased to one-forth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the f
A flask is sealed at 600 K with partial pressures of H2 = 1.98atm and I2 = 1.71 atm. The gases react to form HI according to the equation above. Determine the partial pressure of each gas at equilibr
How is the phenomenon of temp explained on the basis of the kineticmolecular theory? what microscopic property of gas moleculesis reflected in the temp measured?
At a particular temperature,N2O5 decomposes according to first-order kinetics with a half-lifeof 3.0 seconds. If the initial concentration of N2O5 is 9.2x10^-2M,what will be the concentration of N2O
Determine the activation barrier for the reaction. What is the value of the rate constant at 18 degree Celsius?
What is the energy in joules per mole of orange light having awavelength of 625 nm? The speed of light is 3.00 X108m/s; Plank's constant is 6.626 X10-34 J s and Avogadro'snumber is 6.022 X1023.
A mixture contains 2.54g eucalptol, 1.76g menthol, 3.21g methyl salicylate, and 1.95g thymol in 205.28g water. What is the percentage composition by mass for each component in the mixture? There are
Solid carbon dioxide (CO2, dry ice) goes directly from a solid to agaseous state at -78°C . (Heat of sublimation=25.2 kJ/mol ) Calculate the amount of heat required for sublimation of 20.5g of d
The decomposition of dimethyl ether, (CH3)2O(g) ® CH4(g) + H2(g) + CO(g), is first-order with a half-life of 1733 s at 500oC. In an experiment at this temperature, if [(CH3)2O]is 0.
The vapor pressure of pure C2H5OH at30oC is 71.2 mm Hg and that of pure CCl4 is121.6 mm Hg. Calculate the vapor pressure of a solution containing20.00g of C2H5OH and 60.00g ofCCl4, assuming ideal
A 30.00 mL solution of potassium nitrate(KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to 1.000 103 mL. The concentration of the final solution is 0.00370&nb
In lab, you have chosen to examine the properties of anideal mixture of tetrahydrofuran (THF, C4H8O) and dimethyl sulfoxide (DMSO,(CH3)2SO).
Calculate the standard entropy change for the dissociation of molecular hydrogen, H2 (g) -> 2 H (g) at 298.15 K andat 1273.15 K, assuming that the heat capacities are constant
When 3.56 g of an unknown hydrocarbon was dissolved in 125 g of benzene, the freezing point of the solution was found to be4.41oC. Analysis of the hydrocarbon showed that it contained 93.71% carbon (b
A chemist wishes to prepare 250 ml of a buffer that is pH = 4.5.Beginning with 100 mL of 0.12 mol/L acetic acid and a supply of0.10 mol/L NaOH, explain how this could be done.
A 1.00 mL pipet sample of dilute acetic acid required 23.4 mL of 0.10 M NaOH to titrate the sample to a phenolphthalein endpoint. Calculate the concentration of acetic acid in the sample.
Dimethylhydrazine is a C-H-N compound used in rocket fuels. When burned completely, a 0.312g sample yields 0.458g CO2 and0.374g H2O. The nitrogen content of a 0.486g sample is converted to 0.226g N2
If a reaction is exothermic, predict the effect (shift right, shiftleft, or no effect) of increasing and decreasing the reaction temperature. How does the value of the equilibrium constant depend on
When enzymes are present in very low concentrations, their effecton the rate of a reaction can be described using first-order kinetics.