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When a weather balloon started to ascend, the temperature was 28°C and the pressure 90,64 KPa. If the maximum temperature achieved was -36°C at 53,3 KPa, what percentage of the final volume was the initial volume if the balloon was totally expanded ?
What is the difference between Kc and Qc? How can you use Kc and Qc to predict the direction of equilibrium mixture to move?
Species that have the same number of electrons are described as isoelectronic. What +2 ion is isoelectronic with Rb+ What -ion
For H3PO4, a tripotic acid, Ka1 = 7.1 × 10-3, Ka2 = 6.3 × 10-8, and Ka3 = 4.5 × 10-13. What is the pH of a solution which contains 0.200 mol of K2HPO4 and 0.300 mol of Na3PO4 per liter of solution?
Calculate the sample of concentration. Is this an appropriate concentration for 1H NMR, 13C NMR or both?
1 what is the percent by mass of a solution in which 60. g of naoh are dissolved in sufficient water to make 100 g of
When 5.00 g of fructose, C6H12O6, (FW 180.16 g/mol) is burned in a calorimeter whose heat capacity is 29.7 kJ/oK, the temperature increases by 2.635oK. Calculate the heat of combustion of fructose in kJ per mole.
Determine the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency = 1.3 x 10^15 Hz? Express your answer in Joules
A vessel which is 5 m^3 is filled with propylene. The pressure inside the vessel is 470 psi, and the temperature of the vessel is 25 C. A) How many kg of propylene are in the vessel?
What is the molarity of chloride ion when a mass of 27.1 g of calcium chloride is diluted to a volume of 250 mL in a volumetric flask? The molarity of chloride ion in the solution is _____x10^____2 M.
Write a mechanism for the reaction of an alkyl halide with alcoholic silver nitrate which depicts the type of substitution which occurs. Explain how this mechanism accounts for the relative rate of reactivity of primary, secondary and tertiary hal..
Suppose a buffer solution is made from formic and (HCHO2) and sodium formate (NaCHO2). What is the net ionic equation for the reaction that occurs when a small amount of hydrochloric acid is added to the buffer?
KCN is dissolved in water in a calorimeter that has a total heat capacity of 3.850 kJ·K-1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KCN.
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