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1.a) When 23.6 g of calcium chloride were dissolved in 300 mL of water in a calorimeter, the temperature of the water rose from 25 degree Celsius to 38.7 degree Celsius. What is the heat energy change in Kcal for this process? ( The specific heat of H2O=1.00 Cal/g *C)
b) You calculated the heat energy produced by dissolving 23.6 g of calcium chloride in water. Using your number as a conversion factor, how much heat energy is produced when one mole of calcium chloride dissolves in water? Report your answer in kJ/ mole.
Explain Zinc sulfide reacts with nitric acid to give zinc sulfate and nitric oxide. Compute the mass of zinc required to react with 110mL of 0.15 M nitric acid
The formula for the determination of energy is e=hv=hc/lamba where h is planck's constant and c is the speed of light. what is the relationship between wavelength and energy?
What is the molar concentration of a H3PO3 solution if 150.00 mL of the solution was required to neutralize 75.00 mL of NaOH whose concentration was 1.50 molar?
In a quantitative examine study, 5.611 g of a compound containing carbon, hydrogen and oxygen only yielded 15.39 g of CO2 and 12.61 g of H2O in a combustion examination apparatus. Find out the empirical formula of the compound.
Problem: Find the minimum sum of products expression using Quine-McCluuskey method of the function F(A, B, C, D) = ∑m(1, 5, 7, 8, 9, 13, 15) + ∑d(4, 6, 11).
Standardization of Na2S2O3, Added 0.12 g KIO3 and dissolved in 75 mL of distilled water. Added .20 g of KI to solution, then added 10 mL of 1M HCl and immediately titrated with thiosulfate solution (made by weighed 25 g of Na2S2O3-5H20
What is the concentration of cyanmenthemoglobin solution whose absorbance in a 1mm cell is 0.690 - The absorbance at 540 nm of 1mM solution of cyanmethemoglobin is 11.0.
describe three different ways you could make an aceticacidacetate buffer with acetic acid sodium acetate deionizedwater
Calculate the final temperature that results when a 13.0 -g sample of water at 23.1C absorbs 870 J of heat.
The density of the solution is 0.90 g/mL. Specified 450 grams of a 0.75molal solution of acetone C3H6O in water. Explain how many grams of acetone are in the amount of solution
Define a solution contains Ag+ and Pb2+ ions. The addition of 155.0 mL of 1.50 M NaCl is just sufficient to precipitate all the Ag+ and Pb2+ ions. If the total mass of the preciptiate is 32.8g; Define how many grams of AgCl is in the precipitate
write chemical equations which show what happens when carbondioxide is absorbed by sodium hydroxide and when barium
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