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You are given a compound with an unknown concentration and you have five samples with known concentration of the compound. List 3 pieces of information you need to determine in order to calculate the unknown concentration spectrophotometrically.
A rock sample contains traces of 238U, 235U, 232Th, 208Pb, 207Pb, and 206Pb. Careful analysis shows that the ratio of the amount of 238U to 206Pb is 1.164
Container A holds 727 mL of ideal gas at 2.20 atm. Container B holds 134 mL of ideal gas at 4.20 atm. If the gases are allowed to mix together
calculate the concentration of all soluble Hg(II) species. Which Hg(II) species is most prevalent? Assume there are no solids present, that the major ligands present are Cl- and OH-, and ignore activity corrections.
A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C
KCL,KCLO3, and MnO2 having a total wight of 23.584 was jeated tp decompose the KCLO3. After heating, the mass was found to be 22.347g. how many moles of oxygen gas was evolved.
For the reaction A + B C, the rate constant at 215 degrees C is 5.0 X 10^-3 and the rate constant at 452 degrees C is 1.2 X 10^-1 a) What is the activation energy in kJ/mol?
A 25.00 mL sample of propionic acid, CH3CH2COOH, of unknown concentration was titrated with 0.1137 M KOH. The equivalence point was reached when 40.17 Ml of base had been added. The concentration of the original propionic acid is
to determine the partial pressure of each gas in a mixture of gases using daltons law of partial pressures.1.dry air
Fundamentally, why would any line in the hydrogen spectrum between 250 nm and 700 nm belong to the balmer series. How much energy in kj per mole does it take to ionize an H atom
How would you prepare a liter of "carbonate buffer" at a pH of 10.10? You are provided with carbonic acid (H2CO3), sodium hydrogen carbonate (NaHCO3), and sodium carbonate (Na2CO3). Ka value of H2CO3= 4.2x10^-7
What is the pH of a solution formed by adding 50.20mL of 0.1153M NaOH to 505.8mL of 0.01357M aspartic acid. the 0.01357M refers to the concentration of the neutral form of the amino acid before the addition of NaOH
The results of four replicate measurements were 5.4, 5.2, 5.5, and 5.2 m. Measurements were also made of the height of the tank, yielding 9.9, 9.8, and 9.6 m. Calculate the volume of the tank and the uncertainty in that volume.
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