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Geophysical conditions are sometimes therefore extreme that quantities neglected in normal laboratory experiments assume overriding importance. For instance, consider the formation of diamond under geophysically typical pressures. The densities of the two allotropes are 2.27g/cm3 (graphite) and 3.52 g/cm3 (diamond) at the temperature of the environment. Explain By how much does U for the transition differ from H in a region where the pressure is 500 kbar?
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln k versus 1/T (in K) is linear and has a slope of -7445 K. Calculate the activation energy for the reaction
Justify the Born-Oppenheimer approximation based on vibrational frequencies and the timescale for electron motion.
Blueberry plants have blue fruit and green leaves. which absorbs light of higher frequency, the blue fruit or the green leaves. Explain
an unknown carbohydrate compound has the empirical formula ch2o. a solution consisting of 0.515 g of the carbohydrate
A 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. The solution freezes at -1.23°C. Calculate the molecular weight of the solute. Kf for water = 1.86°C/m.
determine whether or not the mixing of each of the two solutions indicated below will result in a buffer. 150 mL of .10M HF, 135 mL of .175M HF
Compound B has molecular formula C6H10O and does not possess any bonds. When treated with concentrated HBr, cis-1,4-dibromocyclohexane is produced. Identify the structure of compound B.
How much heat is released when 75 g of octane is burned completely if the enthalpy of combustion is -5500 kJ/mol C8H18? C8H18 + 25/2 O2 --> 8CO2 + 9H2O
why do firefighters recommend the use of a deluging volume of water when extinguishing an oxidizer-supported fire? what
What is DeltaH°for the hydrolysis of atp to adp and pi ? Assume that the heat capacity of the system is 418 j/kelvin
Phenol and straight chain alcohol, The compound C6H5OH is a phelol, and C6H13OH is a straight chain alcohol.
A hypothetical element has a BCC crystal structure, an atomic radius of 0.149 nm and an atomic weight of 96.03 g/mol. What is the density of this element
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