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A solution of CH2Cl2 in the solvent (C2H5)2O has a mole fraction of methylene chloride of 0.302. What mass (g) of the solution must be taken if 1050 g of CH2Cl2 is needed?
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.17-M NaOH is added to 470. mL of each of the following solutions.
One of the first steps in the enrichment of uranium for use in nuclear power plants involves a displacement reaction between and aqueous HF.
In the following experiment, a coffee-cup calorimeter containing 100. \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0
a compound with empirical formula c2h2n dissolved its 0.0800 gram in 10.00 g of c6h6 freezing point of resulting
If the copper is drawn into wire whose diameter is 7.50 , how many feet of copper can be obtained from the ingot? The density of copper is 8.94
The pH of an aqueous weak acid solution is 6.20 at 25 degree celsius. Calculate the Ka for the acid. The initial concentration of the acid is 0.010M
A gaseous mixture containing 0.150 mol fraction of carbon tetrachloride (CCl4) and 0.850 mol fraction of dry air is initially at 65.0°C
a sample of 1.00 l of gas at ntp conditions contains 20 oxygen and 80 nitrogen. calculate the number of moles of each
What is the solubility of calcium phospate in pure water. Also what is the solubility of it in 0.3m Na3Po4.
Calculate the formula weight of CuSO4 . Use the following atomic weights: Cu is 63.5463 g/mol, S is 32.0666 g/mol, and O is 15.99943 g/mol. Your reported answer should have the correct number of significant figures and units.
Actually, whether these collisions are elastic or inelastic makes no difference as long as the walls are at the same temperature as the gas. Explain.
a photon has a wavelength of 741nm calculate the energy of the photon in joules
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