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A 7.81g sample of HCN contains 0.289g of H as well as 4.05g of N. Determine the mass of carbon in a sample of HCN with a mass of 3.68g.
A volume of 40.0 ml of aqueous potassium hydroxide was titrated against a standard solution of sulfuric acid. What was the molarity of the solution if 13.2ml of 1.50 M was needed
What is the molality if a solution in which 15 g of I2 is dissolved in 500. g of alcohol?
the pressure on a 625 ml sample of gas is changed from .925 atm to 1.45 atm. what is the new sample of gas?
Suppose a reversible heat pump transfers heat from the outdoors at 0 degrees C to a room at 20 degrees Celsius. For each Joule of work input to the heat pump, how much heat will be deposited in the room?
butanes c4h10 molar enthalpy of vaporization is 22.44 kjmol and its normal boiling point is -0.4 degrees c. a 250-ml
What is the pH and the [OH-] of the solutions with the following [H3O+]? a) 2.3 x10-4 , b) 4.8 x10-8, c) 6.3 x10-2
what is the molarity of all solutes in this solution. what is the osmotic pressure of the solution at 25 C. assume total dissociation of NaCL.
An aqueous solution of a soluble compound (a nonelectrolyte) is prepared by dissolving 33.2 g of the compound in sufficient water to form 250 ml of solution. The solution has an osmotic pressure of 1.2 atm at 25 Celcius. What is the molar mass (g/..
Write the structure for the pyrrolidine enamine and for the imine of cyclohexane. Write a balanced equation for the acid-catalyzed hydrolysis of each of these compounds.
For the first-order reaction below, the initial concentration of A is 0.240 M. If the concentration of A decreases to 0.0800 M after 21.8 hours, what is the half-life of the reaction
What is the value of the rate constant at the temperature of this experiment. Give an answer with concentration units of molarity and time units of seconds.
A compressed nitrogen cylinder from Praxair has a volume of 43.0L and a maximum pressure of 2265 psi. Assuming that the temperature is 293K
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