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The new standard for arsenate in drinking water, mandated by the Safe Drinking Water Act, requires that by January, 2006, public water supplies must contain no greater than 10 parts per billion arsenic. Assuming that this arsenic is present as arsenate, AsO4^3- what mass of sodium arsenate would be present in a 1.50 L sample of drinking water that just meets the standard
the osmotic pressure of this solution was 0.00222 atm at 25 C. calculate the molar mass of hemoglobin, which is a molecular compound and a nonelectrolyte.
The solubility of CO2 in water at 25°C and 1 atm is 0.034 mol/L. What is its solubility under atmospheric conditions? (The partial pressure of CO2 in air is 0.0003 atm.) Assume that CO2 obeys Henry's law.
a corrosion technologist pipetted a 100 ml hard water sample and titrated it with 37.64 ml of 0.01 M EDTA solution for a total endpoint, and 29.32 ml of 0.01 M EDTA solution for a calcium endpoint.
How much heat (in ) is evolved in converting 1.00 of steam at 145.0 to ice at -50.0? The heat capacity of steam is 2.01 and of ice is 2.09.
Calculate the energy produced when 15 grams of liquid methanol (CH3OH) is completely burnt in air to produce carbon dioxide gas
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 5 state to the n = 3 state
a cucu2 concentration cell has a voltage of 0.24 v at 25m . the concentration of cu2 in one of the half-cells is
Calculate the rate constant and half- life for the radium decay. Starting with 1.0 g of the radium sample, what is the activity after 500 years? The molar mass of ra-226 is 226.03 g/mol.
The silver in part a is then placed in a beaker of boiling water for 15 minutes and then quenched in 100.0 g of water at an initial temperature of 21.5 OC. What is the final temperature of the non-boiling water. Water has a heat capacity of 4.184 ..
For the following, identify the process as a spontaneous process, a nonspontaneous process, or an equilibrium process at the specified temperature.
What is the molar ratio of initiator (2-methylpropionitrile) MW: 164.21 to sulfuryl chloride MW: 134.97 in the procedure? Why is so little initiator needed relative to the amount of chlorinating agent used
What is the ratio of the number of moles of air in the heated balloon to the original number of moles of air in the balloon
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