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Question:
How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100 worth of gold?
The density of the ore is 8.0 g/cm3 and the price of gold is $818 per troy ounce. (14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g)
The product of furan as well as maleic anhydride in diethyl ether reacts at room temperature moreover forms the exo products as the major product. This product decay at its melting point while most other Diels Alder adducts with maleic anhydride d..
Substitution and elimination reactions are competing reactions. Under what conditions can you ensure that substitution will predominate
A liquid mixture of methyl acetate and ethyl acetate at 50oC and 1 atm is in equilibrium with gas containing methyl acetate, ethyl acetate and 23 mole % nitrogen. What are the molar fractions of ethyl and methyl acetate in the liquid and gas phase
When doing the Recrystallization of benzoic acid. Is it better to use just water as the solvent or with methanol and water as a solvent pair. Why and what are the differences
the freezing point of ethanol c2h5oh is -114.6 degrees c and the molal freezing point depression constant for ethanol
using henderson hasselbalch calculate the ph of .5 L of 2.0M solution of nitrous acid, HNO2 that also contains 140g of nano2 (MM=70g/mol)
An aqueous antifreeze solution is 40.0%ethylene glycole (C2H6O2) by mass. The density of the solution is1.05 g/cm3. Compute the molarity, molality, and mole fraction of the ethylene glycol.
In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq)
A chemist produces 460 mL of oxygen gas at - 43 °C and constant pressure. To what Celsius temperature must the oxygen be warmed in order for it to have a volume of 600 mL?
calculate the value for E for the cell at 25oC (b) A current is drawn from the cell until 1.20 g of silver have been deposited at the silver electrode. Calculate the value of E for the cell at that stage of operation.
A sample of an unknown gas effuses in 11.3 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.72 min. What is the molar mass of the unknown gas
Consider the gaseous reaction COCl2(g) CO(g) + Cl2(g) . What is the expression for Kp in terms of Kc
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