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Safrole is used as a topical antiseptic. Calculate the vapor pressure of a solution prepared by dissolving 0.75 mol of safrole in 950 g of ethanol (46.07 g/mol). P°ethanol = 50.0 torr at 25°C.
Suppose that in changing samples, a portion of the water in the calorimeter weere lost. In what way, if any, would this change the heat capacity of the calorimeter?
A gas has an initial volume of 2.75 L at temperature of 285 K. If the temperature changes to 380 K, what is the new volume of the gas if the pressure is unchanged?
How many grams of KOH must be added to .500L of the buffer (206mL of 0.453M HCL and .500L of 0.400M sodium acetate)to change the pH(4.79) by .135 units?
Density and Identity, The mass of 5.00 mL carbon tetrachloride is 7.97g. What is the density of the carbon tetrachloride?
When steam (hot water) is passed over iron, hydrogen gas and iron (3) oxide are formed. What weight of steam would be needed to react completely with 100.0g of iron.
What volume of 2.811 M oxalic acid solution is needed to react to the equivalence point with a 5.090 g sample of material that is 92.10% NaOH
The standard free energy of activation of a reaction A is 76.9 kJ mol-1 (18.4 kcal mol-1) at 298 K. Reaction B is one hundred million times faster than reaction A at the same temperature
A power plant burns 10^4 kg hr-1 of coal containing 2.5% sulfur. The effluent is released from a single stack of height 70 m. The plume rise is normally about 30 m.
Your metropolitan area has been warned by the EPA to lower sulfur dioxide and nitrogen oxide emissions or it will lose substantial federal funding. One citizen's group calls for conservation as a means of drastically reducing electricity consumption.
An incompressible fluid (p(ro)= const) is contained in an insulated cylinder fitted with a frictionless piston. Can energy as work be transferred to the fluid?
What is the specific heat of aluminum if the temperature of a 28.4 g sample of aluminum is increased by 8.1 oC when 207 J of heat is added.
Find the pH of a solution that has a weak acid concentration of 1.72 M and a weak base concentration
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