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Compute the number of electrons in a flake of pure gold valued at $0.44. Assume that the price of gold is $1630.0/troy oz. (1 troy oz = 31.1 g)
A molecular compound contains 92.3% carbon and 7.7% hydrogen by weight. If 0.152 mol of the compound weighs 3.95 g, what is its molecular formula?
Calculate the pH at 25 degrees C of a 0.25-M aqueous solution of oxalic acid (H2C2O4). (Ka1 and Ka2 for oxalic acid are 6.5 x 10^-2 and 6.1 x 10^-5, respectively.)
write a balance equation for the formation of C4H10O(i) from its elements (c) By using the information in this problem and data in Table 5.3, calculate ?H°f for diethyl ether
A 40.0 mL sample of 0.150 M Ba(OH)2 is titrated with 0.400 M HNO3. Calculate the pH after the addition of the following volumes of acid.
a 486 ml sample of water was cooled from 50.0acircdegc to 10.0acircdegc. assuming a specific heat of 4.184 jk g and a
Give the balanced equation for the reaction: formation of 1 mol nitrogen dioxide from its elements (heat is absorbed)
The standard free energy change is -33.41 kJ/mol for the formation (delta G formation) of AgNO3(s) from elements at 25 degrees celsius. What is the equilibrium constant for the reaction? (R = 8.314 J/K mol)
E was found to be -2,000.00 kJ/mol of an unknown liquid hydrocarbon at 298 K. In another experiment it was determined that for each mole of hydrocarbon, 5 moles of oxygen gas are consumed
Hydrogen sulfide is a common and troublesome pollutant in industrial wastewaters. One way to remove H2S is to treat the water with chlorine, in which case the following reaction occurs
What are the linear and volume flow rates. (b) What is the capacity factor, k', and the partition coefficient, Cs/Cm, for this solute. (c) What fraction of time did the solute spend in the stationary phase
A 0.7995 g sample of a compound containing only uranium and chloride is dissolved in water and excess aqueous silver nitrate is added to precipitate 0.9982 g of silver chloride . Calculate the empirical formula of the compound.
Write the overall reaction, showing how much ATP (Adenosine tri phosphate) can be produced per pentose used also write an equation for the generation of NADPH using ribose as a sole source of carbon?
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