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How much heat is required to convert 27.0 g of ethanol at 23 C to the vapor phase at 78 C in kJ? Ethanol (C2H5OH) boils at 78 C. Its density is 0.789 g/mL. The enthalpy of vaporization is 38.56 kJ/mol. The specific heat of liquid ethanol is 2.3 J/g-K.
What is the limiting reagent? Show the reasoning b) Calculate the theoretical yield in milliliters of the butene produced at 740 mm and 25 C when it is collected over water.R=0.0821
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 755mm Hg and a temperature of 25 C
A gas occupies a volume of 1.0 L at a temperature of 27°C and 500 torr pressure. calculate the volume of the gas if the temperature is changed to 60°C and the pressure to 700 torr
what is the pH of an aqueous solution composed of 0.64 M NH4+ and 0.20 M NH3? (Ka of NH4+= 5.6 x 10^-10)
Hydrogen gas was collected over water in a eudiometer at 25 C when the atmospheric pressure was 752 mm Hg. What was the pressure of the hydrogen gas?
After a fatty acid has been desaturated, can it be desaturated a second time immediately thereafter? Why, or why not?
determine the mass of rbcn required to prepare a 500 ml solution which is .12 m rbcn mw 112
A sample of H½O with a mass of 46.0 grams has a temperature of -58.0 àC. How many joules of energy are necessary to heat the steam from 100.0 àC to 114.0 àC if the specific heat of steam is 2.01 J/g àC?
Ascorbic acid has a molar mass of 176.14 g/mol . What is the molecular formula of ascorbic acid
For the reaction 2HCl+Na2CO3 →2NaCl+H2O+CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP?
An 0.758 mol sample of neon gas at a temperature of 18.0 oC is found to occupy a volume of 24.0 liters. The pressure of this gas sample is. answer in mm Hg please.
A 0.451 M solution of a weak acid, HA, has a pH of 4.01. Calculate Ka for the acid. Use E notation and 3 significant figures.
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