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If the fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6°C. The specific heats of C2Cl3F3(l) and C2Cl3F3(g) are 0.91J/g•K and 0.67J/g•K respectively. Explain the heat of vaporization for the compound is 27.49 kJ/mol. Compute the heat required to convert 23.0 g ofC2Cl3F3 from a liquid at15.00°C to a gas at 82.00°C.
If the pressure exerted by ozone, O3, in the stratosphere is 3.0*10^-3 atm and the temperature is 250 K, how many ozone molecules are in a liter?
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
Teeth are made principally from the mineral hydroxyapatite, Ca5 (PO4)3OH, which can be dissolved in acidic solution such as that produced by bacteria in the mouth
A 2.30 L sample of O2(g) was collected over a liquid at a total pressure of 785 torr and 25°C. When the O2(g) was dried (vapor of that liquid removed), the gas had a volume of 1.86 L at 25°C and 785 torr.
when al metal reacts with hbr aluminum bromide and hydrogen gas are formed. if you started with 3.75 g of aluminum and
Identities of the components in a mixture may be determined by a technique called spiking. Suppose you had run a gas chromatogram on your product and had then deliberately added a drop of a known sample of 3-methylcyclohexene to a drop of your pro..
Oxalic acid is a diprotic acid that occurs naturally in some plants. Calculate the pH and the concentrations of all species present in a 0.36-M solution.
How would the geometry of the product (isoborneol) change (OH in an endo or exo position) if all the methyl groups of camphor were replaced with H
what is the maximum mass of an object traveling at 549 m·s-1 for which the de Broglie wavelength is observable?
What is the relationship between pressure and temperature at constant volume in a pressure chamber
What is the pH of a solution made of 10 mL of 0.1 M Nh3 (aq) (K = 1.8 X 10^-5) when mixed with 10 mL of 0.1 M NH4Cl
The natural abundance of 13C is only 1.1%. Furthermore, its sensitivity in NMR spectroscopy (a measure of the energy difference between a spin aligned with or against an external magnetic field)
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