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Explain what is the enthalpy of vaporization for H2O at a temperature of 373.15K.
1.Determine the molar mass of a gas, if 3.94g of the gas occupied a volume of 3.52L at STP.
an unknown gas sample is collected in a 255 ml countainer at 25c and 755 mm hg. how many moles of gas are present?
The temperature of the calorimeter rises by 25.4oC (Celsius). Specified that the energy of combustion (?E) for stearic is -40.5 kJ/g, compute the heat capacity of the bomb calorimeter. Make sure you enter kJ/C for your unit behind the number.
What is the boiling point of an aqueous solution containing 468g of sugar in 350 g of water. Boiling constant of water is 0.53 o/m
After obtaining a preliminary melting point range of 124-130 degrees C for an unknown, you identify it as benzamide. Running a mixed melting point determination with benzamide affords a melting point range of 117-125 degrees C
a 25 mL sample of .150 M hypochlorous acid is titrated with a .15 M NaOH solution. What is the pH after 26 mL of base is added? The Ka of hypochlorous acid is 3.0x10^8
Calculate the pressure exerted by 12.3 moles of neon gas in a volume of 5.55 L at 25C using (a) the ideal gas equation and (b) the van der Waals equation
The ionization energy for sodium is +496 kJ/mol. The electron affinity for chlorine is -349 kJ/mol. Use these values and Hess's law to calculate the enthalpy for the following reaction:
The mass spectrum of an organic compound shows the relative abundances of M to be 34.83% and M 1 to be 6.027%. Assuming the peaks are caused by 12C and 13C isotopes
What is the energy released when 0.711 g are converted to energy? Express your answer in joules. For self-consistent units you must use kg because 1 J = 1 kg m2/s2.
1)The standard electrode potential for the reduction of Eu3+(aq) to Eu2+(aq) is ?0.43 V. determine which of the following is capable of reducing Eu3+(aq) to Eu2+(aq) under standard-state conditions
A misture of .25 mol N2 an d .60 mol H2 are placed in a 1.0 L evacuated flask at 300 degrees Celcius and it is then allowed to reach equilibrium. If the equilibrium misture contains .45 mol H2, what is the equilibrium constant for reaction
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