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The enthalpy for oxidation of diamond by oxygen to carbon dioxide is -395.4 kJ/mol but the enthalpy for oxidation of graphite to carbon dioxide is -393.4 kJ/mol. Find the enthalpy of reaction for graphite going to diamond. Is this reaction exothermic or endothermic? What does it imply about the chemical bonding in diamond compared to graphite?
A gas mixture is made by combining 7.2g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 92.04L. What is the molar mass of the unknown gas in g/mol, and identify the unknown gas
A unit of heat energy that was formerly used frequently was the calorie (cal). Calculate the calorimeter constant for the coffee-cup calorimeter in terms of cal/g degrees C.
has Kp = 45.9 at 763 K. A particular equilibrium mixture at that temperature contains gaseous HI at a partial pressure of 4.00 atm and hydrogen gas at a partial pressure of 0.273 atm. What is the partial pressure of I2?
In a 1.0× 10-2 M solution of NH4ClO4(aq), identify the relative molar amounts of these species from Most to Least.
What is the wavelength of light in unites of nm emitted when the elctron in a hydrogen atom undergoes a transition from level 7 to level 1
A zero-order reaction has a constant rate of 2.90×10-4 M/rm s. If after 65.0 seconds the concentration has dropped to 9.00×10-2 M, what was the initial concentration.
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
What characteristic H NMR absorptions would be expected in the aliphatic region for 9-hydroxyfluorene
How much heat is needed in kJ to convert 878 g of ice at -10°C to steam at 134°C? (The specific heats of ice, steam, and liquid are 2.03 J/g · °C, 1.99 J/g · °C, and 4.18 J/g·°C, respectively. The heat of fusion is 6.02 kJ/mol and heat of vaporiza..
A 28.0-g sample of water at 250. K is mixed with 47.0 g water at 300. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Using the data given below, calculate the residence times of the solutes in seawater. The amount of water flowing from rivers to oceans = 3.74 x 10^19 g yr-1 , and the amount of water in oceans = 1.35 x 10^24. What is the residence times of these ..
If the ph of Rainfall in Upstate New York is Found to be 4.0, and if the acidity is half due to Nitric acid (HNO3) and half due the two Hydrogen Ions released by Sulfuric acid
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