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Imagine a solution at 25 oC which contain 25.0 mL of ethanol (d = 0.800 g/mL) and 40.0g of water (d =1.00 g/mL). At this temperature the vapor pressure of water is 23.8 Torr and that of ethanol is 60.8 Torr.
A sheet of aluminum foil has a total area of 1.000 ft^2 and a mass of 3.626g. What is the thickness of the foil in millimeters (density of AL = 2.699 g/cm^3)?
The standard enthalpy of formation for ammonia NH3 is -46.2kj/mol. How much heat is released/absorbed when 1 mole of N2 is reacted with three moles of H2 to produce ammonia
A 15.8 g sample of a nonelectrolyte was dissolved is 104.0 g of water. The solution's freezing point was -1.9°C. What is the molar mass of the unknown compound?
Based on the fact that the alloy has an HCP crystal structure, what general processing technique would you consider for the processing of the turbine blade? Explain your choice.
The pKa of phenol is 9.89. What is the Ka of phenol?
The enthalpy change for the reaction below at 25oC is -1,850 kJ (per mole of C9H20). What is the internal energy change for the reaction at 25oC
A canister is filled with 310 g of ice and 100 g. of liquid water, both at 0 C . The canister is placed in an oven until all the has boiled off and the canister is empty.
Determine the total number of atoms in this chemical formula and calculate the molar mass of the solute and how many moles of solute are in the solution?
Draw a Lewis structure for each of the following molecules and determine its molecular geometry. What kind of intermolecular forces are present in each substance?
A 283-g sample of nickel at 100.0°C is placed in 100.0 mL of water (density = 1.00 g/mL) at 22.0°C. What is the final temperature of the water?
Draw the expanded structural formula for the following condensed formula.
Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7)
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