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Calculate the concentration of permanganate when 1g of potassium permanganate is dissolved in 50ml of water.
equilibrium constant Kc for the reaction: H2 (g) + CO2 (g) - H2O (g) + CO (g) a) in one experiment, a container is introduced in a mixture formed by the four shown in the reaction gases
What one reagent should re-energize the light solution after it has faded? Explain using moles and limiting reagents.
Aluminum has a face-centered cubic unit cell. If the atomic radius of aluminum is 125 pm, what is the edge length of the unit cell? A) 177 pm B) 354 pm C) 217 pm D) 500 pm E) 250 pm 3. The meniscus of mercury curves downward in a glass tube formin..
A 1.44 g piece of metal was taken from a beaker of boiling water at 100 oC and placed directly into a calorimeter at 25.0 o C. The calorimeter heat capacity is 1.23 J/K. If the final temperature is 62.5 oC, determine the specific heat capacity of ..
an old container of koh has been found in the chemistry lab. a 4.00 g sample of this impure koh is dissolved in 30.0
Aqueous ammonia is commercially available in a solution that is 28% (w/w) ammonia. What is the mole fraction of ammonia in such a solution
The rate constant for a certain reaction is 1.3 x 10-5 M-1 min-1 at 416 K and 8.8 x 10-3 M-1 min-1 at 660. K. Calculate the activation energy, Ea, for the reaction in J/mol
What is the change in the boiling point of a solution made by dissolving 14.7 g of C6H12O6 into of water. the density of water is and.
A 50.00-mL solution containing NaBr (FW=102.894g/mol) was treated with excess AgNO3 to precipitate 0.2146 g of AgBr (FW= 187.772g/mol). What was the molarity of NaBr in the solution
Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a 25.00 mL aliquot. Titration of the lead required 26.68 mL of the EDTA solution. Determine the com..
A trainee in a medical lab will be released to work on her own results agree with those of an experienced worker at the 95% confidence level
What mass of sucrose should be combined with 455 g of water to make a solution with an osmotic pressure of 8.75 atm at 320 K?
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