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Calculate the minimum number of grams of propane,C3H8 (g) , that must be combusted to provide the energy necessary to convert 3.15kg of ice at -15.5degC to liquid water at 75.5degC. C3H8 (g): deltaHf = -103.85 kJ/mol Sdeg: 269.9 Specific Heat for ice at -3 deg C = 2.094 J/g * C
Write a net ionic equation for the reaction between aqueous solutions of perchloric acid and rubidium hydroxide.
The mass of the Earth's Moon is 7.35 x 10^22 kg. what is the mass expressed in megagrams , Mg?
Explain how can you determine whether one of these two suspected compounds was identical to the unknown compound without using any for of spectroscopy.
The normal boiling point of bromine is 58.8°C. Given that the vapor pressure of methanol is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.
A mixture of ammonium chloride and sand is placed in an evaporating dish and massed at 56.246g. The mixture is heated, driving off the ammonium chloride and massed again
solvents in addition to acetone could be used for extracting plant photosynthetic pigments
A sample of helium has a volume of 3 liters when the pressure is 500 torr. What volume does the gas occupy at 300 torr?
The distance between layers in a crystal is 323 pm. X rays are diffracted from these layers at an angle of 13.1°. Assuming that n = 3, calculate the wavelength of the X rays in nm.
How many grams of the solid can be formed from 268 g of calcium nitrate and 115 g of phosphoric acid?
What fraction of the O3 will have reacted when the rate falls to one-half of its initial value?
A solution is prepared by condensing 5.01L of a gas, measured at 27.0 degrees celcius and 769 mmHg pressure, into 72.1g of benzene. Calculate the freezing point of this solution.
How much of 2,4 hexadien-1-ol would you need to react with 98 mg of maleic anhydride in a Diels-Alder Reaction? (Assume a 1:1 molar ratio of maleic anhydride to 2,4 hexadien-1-ol)
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