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Humans have three types of cone cells in their eyes, which are responsible for color vision. Each absorbs a certain part of the visible spectrum. Suppose a particular cone cell absorbs light with a wavelength of 572.nm. Calculate the frequency of this light.
How do you calculate the molarity of KMnO4 after it has been titrated by .0505 M (COOH)2? The only information you are given is .0011 mol of KMnO4 and no volume...this is for prelab 6.
A standard NaOH solution is contaminated with Na2CO3. In the titration of 50.00 mL of .1002 M HCl solution, 32.00 and 32.50 mL of base are required to reach the methyl orange and Phenolpthalein end points,
A two-tablet sample of a vitamin/mineral supplement weighing 6.08 g was wet-ashed to eliminate organic matter, complexed with a highly colored ligand, and then diluted to 1.00 L volume.
The mass of a cube of iron is 379 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
the values of Hfo given in kJ/mol, calculate the value of ?Go in kJ for the combustion of 1 mole of propane to form carbon dioxide and gaseous water at 298 K.
Compare the pH of an H2CO3 buffer (the first buffer) that contains 0.10 M H2CO3 and 0.10 M NaHCO3 with another H2CO3 buffer (the second buffer) that contains 0.15 M H2CO3 and 0.050. M NaCO3 Carbonic acid has a Ka of 4.3X 10^-7
If the vessel is heated to 500 K, WHat is the percent decomposition of HBr and the equilbirum compositions of the mixtures?
for the next week keep a detailed purchase journal that includes what youve purchased and why. for each entry label the
Write a vector expression for the ball's position as a function of time, using the unit vectors î and j. (Give the answer in terms of t.)
While a 0.3044-g sample of an unknown organic substance is similarly burned in the same calorimeter, the temperature raises by3.72 °C. Explain what is the energy of combustion per unit mass of the unknown substance
The hydrogen phosphate ion is the conjugate acid of the phosphate ion. State the balanced chemical equation and the Ka expression for the dissociation of aqueous hydrogen phosphate.
the iron oxide reacts to form water vapor and Fe(s) but the aluminum oxide remains unreacted. if the residue following heating weighs 1.596g, determine the weight percent of iron oxide in the original mixture.
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