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The heat of fusion for thallium is 21 j/g, and its heat of vaporization is 795 j/g. Thallium's melting point is 304 C, and its boiling point is 1457 C. The specific heat of liquid thallium is 0.13 j/g C. How much heat is needed to change 236 g of solid thallium at 304 C to vapor at 1457 C.
H2C2O4(aq), Ka1 = 6.5 x 10-2 and Ka2 = 6.1 x 10-5. Don't forget that Kw = 1 x 10-14. Then Determine K for the reaction
In an earlier problem we described the reaction of ammonia with oxygen to form nitrogen monoxide, NO.
During the chlorination of drinking water and wastewater, what is it that makes chlorine an effective microbiocide?
The specific rotation of the pure R-enantiomer of a compund is +80 degrees. What is the composition of R- and S-enantiomers in a mixture
Determine at what temperature must a balloon be heated to have six Litres volume consider that the balloon was at the temperature of 25 degree Celsius and volume of two litres initially?
Calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic: a) a balloon is heated by adding 850J of heat. It expands,
At 100 degrees C, the vapor pressure of water, methanol, and ethanol are 760, 2625, and 1694 torr, respectively. Which counpound has the highest normal boiling point.
A sediment sample of clay was equilibrated with ammonium ion (NH4+). The ammonium ion was then displaced with Na+. The total amount of ammonium that had been adsorbed.
A gas occupies a volume of 2.45 L at a pressure of 1.03 atm and a temperature of 293K. What volume will the gas occupy if the pressure changes to 0,980 atm and the temperature remains unchanged?
Calculate the value of q, w, delta E , for the reversible isothermal expansion at 300k of 2.00 mol of a perfect gas
To qualify to run in the 2005 boston marathon, a distance of 26.2 mile, an 18 years old women had to have completed another marathon in 3 hours and 40 minutes or less. To qualify, what must a woman's average speed have been
A solution made by dissolving 14.2 g of an unknown compound in 100.0 g of water has a freezing point of -0.771 °C. If the Kf for water is 1.86 °C/m
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