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To aid in the prevention of tooth decay, it is recommend that drinking water contain 0.90 ppm fluoride (F-).
(a) How many grams of F- must be added to a cylindrical water reservior having a diameter of 5.20 x 102 m and a depth of 47.11 m?
(b) How many grams of sodium fluoride contain this much fluoride?
When red blood cells migrate away from the lungs, initial oxygen dissociation from hemoglobin is stimulated by and further on, dissociation is enhanced by
Hydrangeas are flowers that retain blue coloration when grown in acidic soil and pink when grown in neutral or alkaline soil
what mass of this substance must evaporate in order to freeze 230g of water initially at 16 degrees? the heat of fusion
Calculate the concentration of each reactant in trials 1 through 5 after the flasks contents have been combined but before the reaction takes place.
when 6.6 g solid naoh is dissolved in 30.0 g of water in a coffee cup calorimeter the temperature rises from 25.5 to
How many grams of F2 must react with NaCl in the following reaction if 800 kJ of energy are released? 2NaCl + F2 --> 2NaF + Cl2, ?H = -320 kJ
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.
Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the Platinum atom?
We had this experiment where we took 4-bromo-N-ethanoylbenzeneamine and we refluxed it with HCl to achieve hydrolysis. We then added enough NaOH to render the solution pH 8. We then distilled the mixture in steam to yield 4-bromoaniline. Why was t..
The osmotic pressure of solutions of polystyrene in toluene were measured at 25?C and the pressure was expressed in terms of the height of the solvent of density 1.004 g cm-3.
Determine the number of grams of O2 consumed.
Examine the structures of the following compounds. What functional groups can you identify within the compounds? (They may have more than one.) What structural features do many of these compounds have in common?
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