How much energy (in kilojoules) is required
How much energy (in kilojoules) is required to convert 245 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL ?
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A sealed balloon is filled with 1.30 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 180. torr and the temperature is -32°C. What is the change in volume of the balloon as it ascends f
The distance between layers in a crystal is 393 pm. X rays are diffracted from these layers at an angle of 39.4° What is the difference between the layers?
You have a 1.0cm3 sampleof lead and a 1.0cm3 sample of glass. You drop each in a separate beaker of water. How do the volumes of water that are displaced by the samples compare? Explain.
Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition?
How does a large electronegativity difference affect molecular properties?
An aqueous solution of CaCl2 has a vapor pressure of 84.0mmHg at 50 C . The vapor pressure of pure water at this temperature is 92.6mmHg . What is the concentration of CaCl2 in mass percent?
A sample of chloroform is found to contain 10.5 g of carbon, 93.1 g of chlorine, and 0.88 g of hydrogen. If a second sample of chloroform is found to contain 20.8 g of carbon, what is the total mass of chloroform in the second sample?
When X rays of wavelength 0.084 nm are diffracted by a metallic crystal, the angle of first-order diffraction (n = 1) is measured to be 15.2 degrees;. What is the distance between the layers of atoms responsible for the diffraction?
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