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The sulfide content in a pulp plant effluent is determined with a sulfide ion-slective electrode using the method of standard additions for calibration.
A 10.0-mL sample diluted to 25-mL with water gives a potential reading of -214.6mV
A similar 10.0-mL sample plus 1.00 mL of 0.030 M sulfide diluted to 25.0-mL give a reading of -224.0 mV
Calculate the concentration of sulfide in the sample?
A. A student places 2.10 L of water in his dormitory room, which has the volume of 4.06 x10^4 L. He seals the room and waits for the water to evaporate. At 25 deg C, the density of water is 0.997 g/mL
A star is estimated to have a mass of 1 1036 kg. Assuming it to be a sphere of average radius 7.0 105 km, calculate the average density of the star in units of grams per cubic centimeter.
A dancehall contains 173 men and 238 women. A certain "promenade" calls for the formation of groups, with each group consisting of one man with two women. a)How many groups could be formed? b) which sex is in excess? By how much? (show calculation..
A 100.0-mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. What is the pH of the solution after 100.00 mL of acid have been added to the ammonia solution?Kb = 1.8 × 10-5.
what would the product of the reaction between 1,3-dimethoxybenzene and tert-butanol in the presence
Why do heavier atoms have a larger translational partition function than lighter atoms at the same temperature?
A solid Silver Group (Anion) unknowon that contains only sodium ion as a catio is acidified and divided into tow portions, to both of which 6 M HC2H3O2
Using an aqueous solution of Ba(NO3)2 the density of this solution is measured to be 3.640g/ml and this solution containing barium nitrate mole fraction of 0.01704. compute the molarity of this solution?
For the decomposition of 10.9 Pa azomethane, CH3N2CH3, at 600 K the partial pressure is found
explain why nitration occurs more rapidly in a mixture of concentrated nitric and sulfuric acids than in concentrated nitric acid alone
If 69.5 kJ of heat is applied to a 1032 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
Calculate w (in kJ) when 422 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 445 K:
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