Calculate the mass magnesium sulfide in the mixture
A mixture of the compounds aluminum chloride and magnesium sulfide contains 48.2 g of aluminum chloride and is 68.3 % by mass aluminum chloride. Calculate the mass (g) magnesium sulfide in the mixture.
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A copper penny has a mass of 3.1 g. Being electrically neutral it contains equal amounts of positive and negative electricity.
The pH of ocean water is about 8.1. If it changes as expected over the next century it may drop by 0.3 to 0.5 pH units. What percentage difference in the hydrogen ion concentration will this make?
a. What equal positive charges would have to be placed on the earth and on the moon to neutralize their gravitational attraction?
Calculate the change in molar Gibbs energy of carbon dioxide (treated as a perfect gas) at 200 C when its pressure is changed isothermally from 1.0 bar to (a) 3.0 bar (b) 2.7 x 10-4 atm, its partial pressure in dry air at sea level.
Calculate the molar composition of the product gas for each of the following three cases: (i) theoretical air supplied, 100% conversion of butane; (ii) 20% excess air, 100% conversion of butane; and (iii) 20% excess air, 90% conversion of butane.
A solid sphere of radius R = 40cm has a total positive charge of 26 mC uniformly distributed throughout its volume (the sphere is a non-conductor). Calculate the magnitude of the electric field at
A rigid tank contains 0.1-kg of air at 300 kPa and 300 kelvin. The air is now heated until the pressure doubles. determine the a) the final pressure in the tank (kPa); b) the volume of the tank (m^3).
A container of an ideal gas originally at 30 degrees C is heated to a temperature of 317 C. By what factor does the pressure increase?
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