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A certain substance has a heat of vaporization of 69.66 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 303 K?
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Hydrogen peroxide was catalytically decomoposed and 75.3 mL ofoxygen gas was collected over water at 25 degrees celsius and 742torr. What mass of oxygen was collected? (Pwater =24 torr at 25 degrees celsius)
2 H2S(g) + 3 O2(g) → 2 H2O(g) + 2 SO2(g) Using standard enthalpies of formation, calculate the standard enthalpy change for this reaction.
Why does a hydrate exist only as a solid? What characteristic of a hydrate is responsible for this phenomenon?
a) Glucose is a carbonate that your body can burn for fuel. It is 40 percent C and 6.71 percent H by mass. The rest is O. What is the empirical formula of glucose b) The molar mass of glucose os 180.0 g/mol. what is the ...
Carbon-carbon single bonds in organic molecules have energies about350. kJ/mol. What is the corresponding wavelength? Could UV lamps(248 nm) be used to break these bonds?
A saturated solution of Sr(OH)2(aq) at 25 degrees Celcius has measured a pH of 13.5. Estimate the solubility of Sr(OH)2(aq) in water at 25 degrees Celsius
A mixture consisting of powdered granite and sugar. Water is added and the mixture is stirred then filtered. What is presented on the filter paper? What is present in the filtrate(the liquid obtained in the filtration)? ...
Explain why the mass of the crucible and anhydrous salt is less than the mass of the crucible and the hydrate. What is the chemical formula of copper (II) sulfate?
An analysis of an oxide of nitrogen with a molecular weight of92.02 amu gave 69.57% oxygen and 30.43 % nitrogen. What is the empirical formula of the compound?
Label each of the following phase changes as either exothermic or endothermic. i. H 2 O( s ) + heat H 2 O( l ) (1 point) ii. H 2 O( g ) H 2 O( l ) + heat (1 point)
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