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The rate constant for a certain reaction is = 6.10×10?3 . If the initial reactant concentration was 0.750 , what will the concentration be after 18.0 minutes?
Polyisobutylene (PIB) is equilibrated in propane vapor at 35 oC. At this temperature, the saturated pressure (p10) of propane is 9050 mm Hg and its density is 0.490 g/cm3
Quantum number representations - What are the possible values of the four quantum numbers for one electron in a 5d orbital?
A 0.451 M solution of a weak acid, HA, has a pH of 4.01. Calculate Ka for the acid. Use E notation and 3 significant figures.
Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range
Calculate the pH of a solution containing 25.00 mL of 0.12 M formic acid (Ka = 1.7 x 10^-4) to which the following amounts of 0.10 M NaOH have been added:
The substance X is an element which has the elemental form of X(s) at 25oC. The standard enthalpy of formation of HXO4(g) is -818.0 kJ/mol at 25oC. The standard entropy of HXO4 (g) and X(s) are, respectively 175.8 J/mol•K and 30.70 J/(mol•K) at 25..
Calculate the Calorimeter Constant if 25 g of water at 53C was added to 25 g of water at 25C with a resulting temperature of 35C?
Calculate the volume of oxygen,measured at STP, produced by the decompistion of 2.87 g of potassium chlorate.
Compare the rms speeds. Compare the average kinetic energy. -Consider equimolar samples of the same ideal gas at the same temperature, but different volumes. Sample A has a larger volume than Sample B
Calculate the amount of heat required to completely sublime 68.0 g of solid dry ice CO_2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kj/mol.
The equation below describes the combustion of propane. C3H8(g) + 5O2(g) ? 3CO2(g) + 4H2O (l) a.In the presence of excess oxygen, how many g of CO2 are formed if 322 g of propane are consumed
How much energy (in kilojoules) is required to convert 270 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL?
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