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The chromium in a series of steel samples was determined by ICP emission spectroscopy. The spectrometer was calibrated with a series of standards containing 0.2.0, 4.0, 6.0, and 8.0 µg K2Cr2 O2 per milliliter. The instrument readings for these solutions were 3.1, 21.5, 40.9, 57.1, and 77.3. respectively, in arbitrary units.
(a) Plot the data using a spreadsheet.
(b) Find the equation for the regression line.
(c) Calculate standard deviations for the slope and the intercept of the line in (b).
(d) The following data were obtained for replicate 1.00-g samples of cement dissolved in HCI and diluted to 100.0 mL after neutralization.
Calculate the percentage of Cr2O3 in each sample. What are the absolute and relative standard deviations for the average of each determination?
An IR spectrum for a sample of this solvent is found to show no appreciable absorbance in the region of 1700 cm-1. Of the given possibilities, what is the most likely identity for this paint solvent
57.0 mL of a 1.80 M solution is diluted to a volume of 238 mL. A 119-mL portion of that solution is diluted using 117 mL of water. What is the final concentration.
What is the pressure of the gas in this mercury manometer if h = 73 mm and atmospheric pressure
According to NMR spectra rules, a carbon that is more substituted is more deshielded. For some reason I cannot understand this, because in my mind I see it has more shielding since there is more electron density around it. Please explain in detail..
Write a balanced chemical equation that describes the reaction of iron metal with HCL. Identify the oxidizing and reducing agents in your blanced equation.
methane ch4 ammonia nh3 and water h2o all have octets around the central atom yet they have different shapes and bond
Substrates and reactive groups in an enzyme's active site must be precisely aligned in order for a productive reaction to occur. Why, then, is some conformational flexibility also a requirement for catalysis
for one of the solutions you make up for this weeks experiment 8.00 ml of 2.0e-3 m ironiii nitrate solution is mixed
If the solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 202 kPa?
(a) Considering the energetics of solute-solute, solvent- solvent, and solute-solvent interactions, explain why NaCl dissolves in water but not in benzene (C6H6). What factors cause a cation to be strongly hydrated?
A cube of metal has a mass of 0.321 kg and measures 3.05 cm on a side. Calculate the density and identify the metal.
Potassium metal as well as water reacts to form potassium hydroxide and hydrogen gas. If you react 1.12g of potassium metal as well as 15.0mL of water density = 0.99997 g/mL1) which reactant is the limiting reactant?
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