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Organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluble at room temperature, they add water and this often works. why?
An object made of aluminum has a mass of 8.37g. When it was placed in a graduated cylinder containing 20.0mL of water, the water level rose to 23.1mL. Calculate the density and specific gravity of the object.
Carbon-14 has a half-life of 5730 years. How long will it take for a sample to decay to only 17% of its original amount
Ddetermines how many tablets should be given to her if there are five tablets in stock.
an isolated quantity of an ideal gas at 294.2 k has a volume of 20.46 l at a pressure of 1.18 atm. what is the pressure
What is the purpose of using acetic anhydride in an experiment reacting with salicylic acid to produce acetylsalicylic acid. The answer should include a description of the function of this reagent in terms of how it behaves in the reaction solutio..
ch2 ch2 reacts with hydrogen gas to give ch3ch3 you need to estimate the heat released when bond enthalpies are h h
Write and balance net ionic equation for oxalic acid reacting with permanganate ion in acidic solution.
Consider the cell described below: Al| Al3+ (1.00 M) || Pb2+ (1.00 M) | Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.60 mol/L.
how many possibilities are there to assort the billiard balls in a line include the white cue ball? how many
Alkenes and non conjugated dienes usually have absorption maxima below 200nm. Compounds that have conjugated multiple bonds have maxima at wavelengths longer than 200nm.
There is a relatively constant amount of carbon-14 in living (breathing) things on Earth. Upon death of the plant or animal ,the amount of C14 in the organism decreases, according to the kinetics of first-order decay, A?products.Carbon dating is a..
He is heated until the pressure reaches 3.50 atm. What is the final temperature in degrees Celsius
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