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The solubility of an unknown compound of X in ethanol is found to be 21 grams per 10 ml at 0 Celsius. Explain what is the minimum amount of ethanol needed to recrystalize a 2.0 grams sample of compound x will remain dissolved in the cold solvent (that is how much of the compound x is not reconvered after recrystallization)
Calculate the heat required to convert 50.0 g of C2CL3F3 from a liquid at 20.00 degrees celcius to a gas at 75.00 degrees celcius.
calculate the molarity of each of the following solutions: a) .500 mol of sucrose in .200 L of a sucrose solution. b) 30.4g of LiBr in 350 mL of a LiBr solution. c) 73.0 g of HCl in 2.00 L of a HCl solution.
In clavulanic acid there is a carbon-atom that that has an oxygen-atom, a nitrogen-atom, and a carbon atom attached to it
All useless answers. Shouldn't lose points if answers are not helpful. A 0.4863-g sample of primary standard sodium carbonate (Na2CO3, fw 105.988) was treated with 40.00-mL of a dilute perchloric acid (HClO4, fw 100.458) solution.
How many grams of dry need to be added to 2.50 of a 0.700 solution of ammonia, , to prepare a buffer solution that has a of 8.65. for ammonia is.
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 16.0 L of H2 gas if the pressure of H2 is 729 torr at 21.0°C?
How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+ using a current of 35.2 amps in an electrolytic cell?
What volume will contain 5.0 mol of aluminium? The density of aluminium is 2.7 g/ml.
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.
According to quantum mechanics, all particles of matter exhibit some of the properties normally associated with
If hydrogen and Fe3O4 are the products when iron as well as steam is mixed, state a balanced chemical equation for this chemical reaction
Suppose a 80-kg person drinks 3 L of water every day for 80 years with a arsenic concentration of 50 microgram/L. PF for arsenic is 1.75 (mg/kg-day)-1. Find the daily average dosage.
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