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What is the minimum voltage needed to produce a reaction in the electrolysis of copper(II) sulfate using inert electrodes? This is the same as asking what is Ecell for the electrolytic cell. However, express your answer as a positive number.
Consider the reaction Cu2S + O2 → 2Cu + SO2. If 55.0 grams of Cu2S is heated in excess O2, what is the mass of Cu that can be produced?
What is the freezing point of a solution of ethylene glycol, a nonelectrolyte, that contains 81.0 g of (CH2OH)2 dissolved in 505 g of water?
A calibration curve for absorbance versus the concentration of the chemical indicator crystal violet is found to have a slope of 19. If a sample of unknown concentration has an absorbance of 1.32
A rock from Australia was found to contain 0.438 g of Pb-206 to every 1.00 g of U-238. Assuming that the rock did not contain any Pb-206 at the time of its formation how old is the rock
A titration is performed by adding 0.400 M KOH to 40.0 mL of 0.300 M HCl. What is the pH after addition of 5.0 mL of the base?
If a bottle of nail polish remover contains 181 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL.
Pure liquid water can be supercooled to temperatures below its freezing point. Consider 10 kg of water cooled as a liquid to -10 Celsius. Let's now add a small crystal of ice (whose mass is negligible) as a "seed"
Calculate the equilibrium [F-] in a saturated solution of CaF2 and 0.0223 M Ca(NO3)2. Take ionic strength effects into account.
a graduated cylinder contains 138 of water. a 12.0 piece of iron density 7.86 and a 22.0 piece of lead are added.
Calculate the volume in mL of a solution required to provide .85 g of acetic acid (CH3COOH) from a .30 M solution
a reaction mixture initially contains a br2 partial pressure of 765 torr and a cl2 partial pressure of 730 torr at 150
Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one cubic centimeter of mercury?
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