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Question- Estimate the calcium concentration in a groundwater sample, which has a pH of 5.50. Assume that the groundwater at his location is saturated with CO2 at a partial pressure of 0.1 atm.
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Briefly describe the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
Compute the final concentration of H+ or OH- if 24.0mL of 1.95M Ba(OH)2 is mixed with 34.0mL of 2.30M HCL. Presume the volumes are additive and that HCL and Ba(OH)2 are ionied completely.
Calculate the molarity of the 25.0 mL sample of 0.100 acetic acid which was diluted with 25.00 mL H2O
An alkyne of six carbon atoms gives the same single product in its reaction either with BH3 in THF followed by H2O2 /OH-, or with H2O/Hg2 /H3O . Draw the structure of the alkyne (containing only carbon and hydrogen atoms).
Identify and describe the structure and function of specialised cells of protection, sensation and secretion in the integumentary system
A solution of I2 was standardized with ascorbic acid Using a 0..1 g sample of pure ascorbic acid, 23.52 mL of I2 were required to reach the starch end point.
The Temperature is a constant 400.0 K. Calculate won, the work done on the system, and report the answer in Joules.
Calculate the approximate molarity of this solution from the volume, percent composition, and density.
A stock solution is prepared by adding 24 mL of 0.4 M Na3PO4 to enough water to make 79 mL. What is the PO43- concentration of 25 mL of the stock solution?
a a 100g of bulk water is dispersed as droplets of radius0.5x10-5 mm. if the surface tension of water is7.2x10-2 nm
silver iodide in grams will dissolve in a solution that is a 2.0 x 10^-4 M silver nitrate when the system reaches equilibrium
The reaction can be catalyzed by a strong acid. A food chemist determines that an increase in temperature from 50 to 60 degrees Celcius increases the initial rate of this reaction by a factor of 2.12
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