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the 20 ml of water added to the erlenmeyer flask is to be previously boiled deionized water. Since water does absorb CO2 from the atmosphere and since CO2 dissolved in the water causes it to be slightly acidic , will the use of deionized water that has not been previously boiled cause the mass of the acetic acid in the vinegar to be calculated as too high or too low
Lithium iodide has a lattice energy of -7.3 times 10^2 kJmol and a heat of hydration of -793 kj/mol. Find the heat of solution for lithium iodide.
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water
How long will it take for the concentration of XY to decrease to 12.5% of its intial concentration when the initial concentration is 0.100M? When the initial concentration is 0.200M?
Assuming this mechanism is correct, which is the rate-determining step if the experimental rate law is first order in nitryl chloride?
what is the molarity of a potassium permanganate solution if 25.0 ml of it reacts with 10.0 ml of .0100 M sodium sulfite under acidic condictions.
A mixture of table salt and ice is used to chill the contents of hand-operated ice-cream makers. What is the melting point of mixture of 2.00 lb of NaCl and 12.00 lbs of ice if exactly half of the ice melts?
An aqueous solution contains 0.455 M dimethylamine ((CH3)2NH) How many mL of 0.385 M perchloric acid would have to be added to 150 mL of this solution in order to prepare a buffer with a pH of 10.800.
Calculate the mass percent of a NaCl solution in which 110 g of NaCl is dissolved in 2.41 L of water at 25 0C (density = 0.997 rm g/mL).
the solvent travel only half way up the chromatographic paper in the spot testing chromatogram.predict the effect of this procedural change on the solution of the cation in the standard mixture
A solution is prepared by dissolving 246 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
explain why water is not plotted on the delta t versus molecular mass graph in the analysis .(hint:what makes water different from the other 3 solvents?
Calculate how much heat is required to added or removed to convert 100.0 g of steam at 115 0C to liquid water at 65 0C?
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