Calculating the molar mass of the biomolecule
90-g sample of a large biomolecule was dissolved in 23.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
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A portable water heater transfers 225 watts of power to 5.5 L of water. How much time will it take the water heater to heat the 5.5 L of water from 22 to 40 degrees Celsius?
Given this Ksp for lead(II) chloride, find the molar solubility of this salt in a 0.05M of CaCl2 solution. Will Ca(OH)2 prrecipitate if a 0.1M solution of CaCl2 is added to a solution with a pH of 10.7?
The 20 mm diameter steel rod BC is attached to the lever AB and to the fixed support C shown in Fig 9. The uniform steel lever is 100 mm thick and 30 mm deep.
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A dump truck is shown in the figure. The loaded container has a mass of 8000 Kg and may be modelled as a solid homogeneous block. The hydraulic cylinder applies a force of 300 kN to the container in the starting position shown.
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