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Pheromones are compound secreted by the females of many insect species to attract males. one of these compounds contains 80.78 percent C, 13.56 percent H, 5.66 percent O. A solution of 1.19 g of this pheromone in 7.23 g of benzene freezes at 2.52 Celsius. What are the molecular formula and molar mass of the compound?
(The normal freezing point of pure benzene is 5.5 Celsius)
determine the most important part in chemical bond formation, coulomb, J, or the Exchange, K, term. What is the interpretation of this key result
dissolved in water in a calorimeter that has a total heat capacity of 2.294 kJ·K-1, the temperature decreases by 0.470 K. Calculate the molar heat of solution of KCN.
For each of the following slightly soluble salts, write the equilibrium equation for dissociation and the solubility product expression: a)CuS b)Ag2SO4 c)Zn(OH)2
how many kilojoules of heat are released when 42.4 g of ch3oh at 55 degree celsius is cooled to 15.5 degree celsius.
In an airplane, a gas sample occurs at a volume of 1.5 L at 760.0 torr. Suppose, while flying, the airplane loses pressure and the volume of the gas increases to 11.40 L.
From the subsequent Information, compute the standard change of enthalpy for the combustion of coal. Compound DeltaHf (kj/mol)
many people think salt is added to water to increase the boiling poing so pasta will cook faster. how much salt would
The equilibrium constant for the reaction (cyclohexane --> methylcyclopentane), C6H12(g) --> C5H9CH3(g) was measured over a range of temperatures as ln(Kp) = 4.1814 - 2059/T. Calculate DG°, DH°, and DS° for the reaction at 1000 K.
Calculate the minimum volume of water needed to dissolve 1.00 g of benzoic acid at 100°C. Calculate maximum theoretical percent recovery from the recrystallization of 1.00 g of benzoic acid from 15 mL of water.
determine the partial pressures of each gases at equilibrium. b.determine the equilibrium constant at 350.15 K
a sample of chlorine gas occupies a colume of 711 ml at pressure of 251 mmhg. calculate the pressure of the gas in mmhg
Find the number of moles of water that can be formed if you have 150mol of hydrogen gas and 70mol
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