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Calculate the quantity of sodium fluoride in kilograms needed per year for a city of 50,000 people if there daily consumption of water per person is 170 gallons. (Sodium fluoride is 45.0 percent fluorine by Mass. 1 gallon=3.79 liters, density of water = 1.0 g/ml)?
When a 2.047-g sample that contains only carbon, hydrogen, and oxygen burns in excess O2, the products are 3.80 g CO2 and 1.04g H20. What is the empirical formula of this compound
The absorbance at 340 nm was 0.427 in a 1.000 cm cuvet. The molar absorptivity for this compound at 340 nm is = 6130 M-1 cm-1. Calculate the concentration of compound in the cuvet
Explain the general physics of chromatography. Illustrate these general principles with regard to paper, thin layer, gas, liquid, and super-critical fluid column and open tube chromatography.
the volume of a sample of cl2 is 5.62 l at 740 torr and 33 degrees celsius. what volume will the cl2 occupy at 107
What is the final temperature of the water and pieces of metal?
Explain why does ATP synthesis occur in the presence of Rotenone ( an inhibitor of one the reactions in the electron transport system.) if succinate is combined but not ATP synthesis doesn't occur if L-malate is added?
A mixture consisting of 7.0g CO and 10.0g SO2, two atmospheric pollutants, has a pressure of 0.33 atm when placed in a sealed container. What is the partial pressure of the CO?
In the lower troposphere, ozone is one of the components of photochemical smog. It is generated in air when nitrogen dioxide, formed by the oxidation of nitrogen monoxide from car exhaust, reacts by the following mechanism.
Carbon monoxide gas reacts with hydrogen gas at elevated temperatures to form methanol according to this equation. CO(g) + 2 H2(g) CH3OH (g)
In proteins, the amino acid histidine (His) plays an important role in many biological reactions. The pKa for the protonation of His to form HisH
Determine the percent ionization of the following solutions of formic acid at 25 degrees centigrade (C) : a) 0.016 M, b) 5.7 X 10^-4, c)1.75 M
Compute the boiling point of the above solution in Farenheit.
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