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A 0.9157-g mixture of CaBr2 and NaBr is dissolved in water, and AgNO3 is added to the solution to form AgBr precipitate. If the mass of the precipitate is 1.6930 g, what is the percent by mass of NaBr in the original mixture?
Precision can be judged by examining the average of the deviations from the average value for that data set. Calculate the average value of the absolute deviations of each measurement from the average for the first set. Calculate the average value..
A solution transmittance is 35% at 260 nm. What will the solution absorbance be if you dilute 25.0 ml
The maximum temperature of the mix was found to be 24.81. Assume the density of water is 1.00 g mL and the specific heat is 4.184J g K. Determine the change in temperature for the Hot water. Determine the change in time for the cold water.
Three trials to determine concentration of unknown substance. Values: .210 M,.198M, .203 M . The actual concentration is .135 M.
calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550mL of solution
An organic substance has an enthalpy of vaporization of 29.0 kJ/mol. The compound has a vapor pressure of 524 mm Hg at 25 °C. At what temperature is the vapor pressure equal to 115 mm Hg?
a 2.12 g sample of kclo3 s was heated to produce kcl s and o2 g. the sample of oxygen was collected over water. the
Manganese (II) sulphate produced when 5.65 g of potassium permanganate react with excess sulphurous acid
Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3°C.)
Calculate the pH of a solution prepared by mixing 15.0mL of 0.10M NaOH and 30.0mL of 0.10M benzoic acid solution. (Benzoic acid is monoprotic; its dissociation constant is 6.5x10^-5.)
nbspif an amount of heat 6.824 kj of is added to a coffee cup calorimeter containing 54.55 grams ofnbspwater in
Why is it difficult to construct a Lewis Dot structure for the molecule NO? What kind of molecule is this
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