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HSO4- is a weak acid with pka value of 1.82, what percentage of HSO4- is dissociated in 2M solution? Why does molarity approximate molality at low concentrations?
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A student weighed out 1.74 grams of sodium hydroxide pellets and added them to 48.0 grams of water in a calorimeter. Extrapolating back to the time of mixing yielded a temperature change at the time of mixing equal to 9. ...
The molecular weight of an unknown gas was measured by an effusion experiment. It was found that it took 64 seconds for the gas to effuse, whereas nitrogen required 48 seconds. The molecular mass of the gas is ?
What is an example of a specific transition metal solution, including the oxidation state of the transition metal, and the color of the solution, and the complex ion that the transition metal forms in that solution if ap ...
Assume that you dissolve 10.2 g of a mixture of NaOH and Ba(OH)2 in 227.0 mL of water and titrate with 1.47M hydrochloric acid. The titration is complete when 107.8 mL of the acid has been added. What is the mass (in gra ...
1.00 mole of sodium carbonate (formula mass 106.0) is converted to sodium chloride, Na2CO3(s) + 2HCl(aq)® 2NaCl(aq) + H2O +CO2(g). The percentage yield in this conversion is 80%.Which of the following is correct: a. 0.80 ...
A decompression chamber used by deep-sea dives has a volume of 10.3 m 3 and operates at an internal pressure of4.5atm. What volume, in m 3 would the air in the chamber occupy if it were at 1 atm pressure, assuming no t ...
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2 moles of a compound are allowed to react ina foam coffee cup that contains 197 grams of water. The reaction caused the temperature of the water to rise from 21 to24.7 degrees Celsius. What is the enthalpy of this react ...
A sample of a substance (containing only C, H, and N) is burned in oxygen. 8.696 g of CO 2 , 2.225 g of H 2 O and 4.446 g of NO are the sole products of combustion. What is the empirical formula of the compou ...
If 14.40 grams of RbCl are dissolved in water to make a solution of 0.224 L, the density is found to be 1.047 g/cm 3 . Calculate the molality of the solute.
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