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The contents of an open Kool-Aid packet are dissolved in enough water to give a total volume of 100mL. Exactly 25mL of this solution are diluted with deionized water to a new volume of 75mL. The absorbance of this solution is found to be 0.35. How many grams of Kool-Aid were in the opened package?
A scientist wishes to prepare a 1L sample with the approximate composition of seawater for use in the laboratory: what reagents would you recommend and what mass of each
Calculate the energy in joules and calories lost when 18.0 {rm g} gold ({rm Au}) cools from 226^circ C to 124^circ C.
What is a significant obstacle when using osmometry to determine molar masses for compounds with very high molar masses? A. The osmotic pressures may be too high to measure.
calculate te single ion actvity coefficients for Cs^+, Cd^2+, Al^3+ and dissolved H2CO3 s a function of ionic strength
A voltaic cell is created with one half-cell consisting of a copper electrode immersed in 1.0 M CuSO4 solution and the other half cell consisting of a lead electrode immersed in a 1.0 M Pb(NO3)2 solution. Each half-cell is maintained at 25o C. Wha..
what is the role of lithium hydroxide in the removal of the carbon dioxide exhaled by astronauts?
in a laboratory, 6.82 g of Sr(NO3)2 is dissolved in enough water to form 0.500 L of solution. A0.100-L sample is 0.0245 M solution of Na2CrO4.
Their boiling points in C are: Ne -245, Ar -186, Kr -152, Xe -107. Using the periodic relationship between the noble gases, predict the boiling point of Radon.
a 10.00g sample of toothpaste contaning stannous fluoride gives0.145g precipitate of stannous phosphate.what is the percentage of snf2 in the toothpast sample.
For a particular reaction, deltaH is -93.8kJ and deltaS is -156.1 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
The boiling point of the solvent and of the solution and the weight of the solute and solvent. The freezing point of the solvent and of the solution and the weight of the solute and solvent.
What is the freezing point of a solution made by dissolving 352g of ethylene glycol C2H6O2 on 648 g of water the freezing point of pure water is 0.0C and kf of pure water is -1.86Cm?
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