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Problem- Gold is all around us. According to data published by the U.K.'s National Physical Laboratory, gold has an abundance of 0.940 ppb by weight and 6.18 ppt by moles in the solar system. Using dimensional analysis and unit conversions, determine an effective molar mass for the earth's crust and an effective molar mass for the solar system.
Any expert will able to provide correct answer for the above question.
A 0.150- M solution of chloroacetic acid (HC2H2ClO2) has a pH of 1.86. What is the value of Ka for this acid and the percent ionization?
For the galvanic cell employing the cu, cu2+ and Cd, Cd2+ couples, calculate the maximum amount of work that would accompany the reaction of 1 mol of lead under standard conditions.
What would be the activation energy for the reverse reaction in the presence of a catalyst that decreased the activation energy for the forward reaction to 107 kJ/molrxn
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
Draw a Lewis Structure for C3O2. Draw a Lewis Structure for C2H3NO5
A mixture is made by mixing 40.7 mL 0.000200 M HCl with 38.3 mL of 0.000180 M NaOH. Based upon these values, the mixture's pH will be
The plot of In P vs. 1/T for a liquid produces a curve with slope -860k. what is the enthalpy of vaporization for the liquid
2H2(g) + O2(g) --> 2H2O(l), delta H = -572 kJ. How much heat is evolved when 4.03 g of hydrogen is reacted with excess oxygen
Adrenaline is the hormone that triggers the release of extra glucose molecules in times of stress or emergency. A solution of 0.64 g of adrenaline in 36.0 g of CCl4 elevates the boiling point by 0.49°C. What is the molar mass of adrenaline?
Calculate the volume the gas will occupy if the temperature is increased to 175 degree Celcious while the pressure is held constant.
Problem- The solubility product constant for calcite (CaCO3(s)) is 4.94*10^-9 at 298.15K. Compute the solubility of CaCO3(s) in H2O at 298.15K. You may use the Debye-Huckel theory to compute activity coefficients if needed.
The solubility of calcium sulfate is 0.67 g/L. Show the calculation of the Ksp for calcium sulfate (all steps including chemical equilibria must be correct for full credit)
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