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What is a meniscus? Why do some liquids develop a meniscus? How do we read the liquid level in a volumetric measuring device in which a solution forms a meniscus?
how many grams of potassium sulfate are required to make 385 ml of 2.5M solution
Calculate the net charge of Aspartic Acid. Its given that Aspartic acid has a pK1 COOH at 1.99 and also a pK2 NH3 group at 9.90. PKr Side Chain is 3.90 (COOH) How do i find the net charge?
Zinc is extracted from its ore by heating with carbon in the blast furnace. How much zinc oxide do you need to make 130 g of zinc?
Compute the number of grams of H 2 SO 4 in 1 gallon of battery acid if the solution is 38.9% sulfuric acid by mass and has a density of 1.33g/mL ?
The enthalpy of formation of ethanol, C2H5OH, is 277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O.
What is the molality of ethanol in a solution made by dissolving 14.6 g of ethanol, C2H5OH, in 53.6 g of water?
How much heat energy, in kilojoules, is required to convert 73.0 g of ice at -18.0 0C to water at 25.0 0C ?
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
What is the percent yield of a reaction in which 282 g phosphorus trichloride reacts with excess water to form aqueous phosphorus acid (H3PO3) and 114 g HCl?
A solution is prepared by dissolving 246 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
A gas measures 180.0 mL at 87.0°C and 800.0 mm. Find its volume at standard temperature and 800.0 mm of pressure.
The temperature of Beaker X = 75°C and the temperature of Beaker Y = 50°C after Five minutes . determine the temperatures be after another 5 minutes have passed?
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