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Problem- Calculate the change in entropy of 1.0 L of water at 0 degrees C when it absorbs 470 J of energy from a heater. (b) If the 1.0 L of water is at 99 degrees C, what is the entropy change? (c) Explain any difference in entropy change.
Demonstrate all steps to describe the solution of above question
A 0.062 M aqueous sample of species y was analyzed by atomic absorption spectroscopy at 525 nm and in a 1.00-cm cell and yielded a %T value of 70.19 % . Calculate the molar absorptivity of species y.
A second solution containing an unknown quantity of the analyte as well as 55.5 uM of the internal standard produced peak areas of 251 for the analyte and 563 for the internal standard. Explain what is the concentration of the analyte in the second..
How and why are the lines from the metal salt solutions different from the hydrogen lines. Explain in terms of theory of hydrogen atoms and salt solution atoms.
The half-life of C-14 is 5730 years. A bone sample with 3.6 g of carbon has 32.6 disintegrations per minute. How old is the bone sample in years?
The combustion of what volume of ethane C2H6, measured at 23 degrees celcius and 752 mmHG, would be required to heat 855g of water from 25 degrees celcius to 95 degrees celcius. The heat of combustion per mole of ethane is -84.7 kj/mol.
What was the purpose of using aq. NaOH in aldol condensation lab? A. It acts as an electrophile on which an enolate ion can attack B. It acts as a nucleophile which can attack an electrophilic carbonyl carbon.
iron has a density of 7.874 g/cm3. what is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000 cm by 5.000 cm?
Explain what is the concentration if HCl in the final solution when 100mL of a 5 M HCl solution in diluted with water to a total volume of .25L
If your absent minded lab partner spilled deionized water into your NaOH solution, diluting it, would the Ka value you determine for the solid weak acid be greater than
How many milliliters of 2.6 M NH4Cl must be added to 260 mL of 0.20 M NH3 to obtain a buffer solution having pH=9.40
A 13.00 g sample of an ionic compound NaA, where A- is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl.
Problem- A solution of Fe(No3)3 and potassium thiocyanate (KSCN) was prepared so that the concentration of Fe3+ and the concentration of SCN- were both 6.0 x 10^-3 M. After mixing and equilibration, the absorbance for the solution at 450 nm was me..
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