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A sample of an arsenic compound weighing 0.1023 g was dissolved and all the arsenic converted to arsenic in the +3 oxidation state. A 0.0250 M solution of an acidified permanganate (MnO4-), was added, which oxidized the arsenic to the +5 oxidation state. The manganese was reduced to the +2 state. If it took 10.64 mL of the permanganate solution to exactly react with the arsenic, what is the percentage of arsenic in the sample?
a) 42.5
b) 47.8
c) 7.79
d) 19.5
e) 48.7
Consider hte boiling of a liquid such as water in a frictionless piston and cylinder device computer the work obtained from the psiton when 1 kg of liquid water is vaporized to steam at 100 degrees C
Calculate the concentration of I - in a solution obtained by shaking 0.20M KI with an excess of AgCl(s)
Gaseous ammonia (NH3, 2.00 L, 703.8 torr, 23.8C) reacts with aqueous sulfuric acid (H2SO4, 0.500M, 175mL) to produce solid ammonium sulfate. 4.8275 g of product is isolated.
Compute for q for the reversible isothermal expansion at 300K of 5.0 mol of a perfect gas from 500 to 1500 cubic cm
What is the major product produced from the reaction of 2-methyl-2-butene with 30% HBr?
A solution is made by dissolving trichloromethane and acetone. The pure vapor pressure of trichloromethane is 221.8 Torr. At the mole fractions of Xacetone = 0.713 and yacetone = 0.818 at 28 ° C and the total vapor pressure is 220.5 Torr.
Calculate q when 15.8 g of ice is cooled from -22.4 degrees Celsius to -71.0 degrees Celsius (C ice = 2.087 J/g*K)
Question- Critical thinking question that I need help with Why not just send oxygen through the blood and let it diffuse into the tissues. Why invest all energy and gene maintains to mark Hb carry the oxygen. Why not just attach oxygen to Fe in th..
A 28.6 g sample of ethylene glycol, a car radiator coolant, loses 700. J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)
Problem- How many minutes will it take to electroplate 49.1g of gold by running 5.00 A of current through a solution of Au+(aq)
Write a 750-1,050 word essay explaining how motivating factors of modern fire research impact fire science. Define how modern fire research has impacted fire science as it relates to each of the following:
calculate the amount of heat needed to boil of ethanol beginning from a temperature of . round your answer to
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