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Question- Write and balance the ionic equation for the red-ox reaction between the permanganate ion and the Fe(2+) ion in an acidic media. Which substance was reduced and which was oxidized?
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Problem- Calculate the molarity of a solution made by dissolving 12.7 grams of Na2CrO4\rm Na_2CrO_4 in enough water to form exactly 580mLmL of solution
At pH 12, magnesium hydroxide is insoluble and does not react with EDTA. The titration of a hard water sample at pH 12 thus yields results for calcium only. A 250.0-mL sample of tap water was adjusted to pH 12 and titrated with 0.01056 EDTA using ..
The half-life for the radioactive decay of [U]-238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 20% of the [U]-238 atoms in a sample of [U]-238 to decay?
a 0.450-kg ice puck moving east with a speed of 3.00ms has a head-on collision with a 0.900-kg puck initially at rest.
calculate the root-mean-square speed of Ne atoms at the temperature at which the average kinetic energy
69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm(3) of solution at 20 degrees C. What is the osmotic pressure of the solution? express your answer in kPa
An unknown had the chemical formula C4H10O. It showed a positive chromic acid test, a positive lucas test in 5 minutes, and a positive iodoform test. What is the structure of the unknown compound
Suppose that 22.65 mL of a 0.02024M permanganate solution was needed to react with the Fe 2+ in a sample that had a mass of 1.1243 g. What is the mass of the Fe 2+ in the sample and what is the % of the Fe 2+ in the sample
A particular smoke detector contains 2.85uCi of 241Am , with a half-life of 458 years . The isotope is encased in a thin aluminum container. Calculate the mass of 241Am in grams in the detector. detector.
additioonal feat dexter and mandark team up in order toprevent the asteroids from destroying earth. they start
A glass as well as calomel electrode system was found to develop a potential of -0.0412V when dipped into a pH 6.00 buffer. While in an unknown solution the cell potential was found to be -0.2004 V. Compute the pH and the activity of hydrogen ion ..
In the American Engineering system of units, the viscosity can have units of (lbf)(hr)/ft^2, while in the SI system, the units are (g)/(cm)(s). Convert a viscosity of 20.0 (g)/(m)(s) to the given American Engineering units.
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