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In a purity check for industrial diamonds, a 11.25 carat (1 carat = 0.2000 g) diamond is heated to 74.21°C and immersed in 27.30 g of water in a constant-pressure calorimeter. The initial temperature of the water is 27.20°C. Calculate ?T of the water and of the diamond (cdiamond = 0.519 J/g·K).
Twater _____ KTdiamond ______ K
Durning the synthesis of Aspirin from Methyl salicylate we perfom a recrystallization. How do I relate the % yield of each compound to the efficacy of the recrystallization technique?
A gas sample has an original volume of 700 ml when collected at 750 mm and 25°C. What will be the volume of the gas sample if the pressure increases to 810 mm and the temperature increases to 30°C?
What are the structures of the products that would be expected to be obtained on hydration of 1-octyne and 2-octyne?
how many grams of ethylene glycol must be added to 700g of water to yield a solution that will freeze at -8.5 degrees Celsius?
A 50.0 mL sample of vinegar (density = 1.06 g/mL) was diluted to 500.0 mL. Titration of a 50.0 mL aliquot of this solution required 42.5 mL of 0.0900 M NaOH to reach the end point. Determin the acid content of the vinegar as wt. % acetic acid.
Determine the mass of propylene glycol neded to substitute one gallon of ethylene glycol and also find out the volume of propylene glycol, required to get the same antifreeze protection as one gallon of ethylene glycol.
Acid rain over the Great Lakes has a pH of about 4.5. Acid rain over of the West Coast has a pH of 5.3. How many times more concentrated is the acid in rain over the Great Lakes?
explain how the ligands of F-, NH3 and CN- bonded to CO3+ can result in a green, yellow-orange, and pale yellow color for these compounds, respectively
Calculate the experimental value for Ksp for KHP and determine whether it is within 10% of the theoretical Ksp value (solubility = 8.0g/L). If not, give one reason why this error might have occurred.
an area of 1.15 m^2 and given that the acceleration due to gravity is 9.8 m/s^2, what is the mass of this column?
What amount of solid NaOH must be added to 1.0 L of a 0.15 M H2CO3 solution to produce a solution with [H+]=3.3*10^-11 M ? There is no significant volume change as the result of the addition of the solid.
Hydrogen sulfide () is a common and troublesome pollutant in industrial wastewaters. One way to remove is to treat the water with chlorine, in which case the following reaction occurs:
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