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Why are the injection port and detector always heated to higher temperatures than the column in a gas chromatograph?
briefly explain why nitrogen is considered to be the most limiting plant nutrient in humid environments. explain the
A 0.5872-gram sample of potassium hydrogen phthalate (KHC8H4O4) is dissolved in 50.0 mL of solution. What is the molarity of this solution
A 0.150 M NaCl solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of NaCl needed to prepare 275.0 mL of a physiological saline solution.
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity as 0.0075 M aluminum sulfate at 15,000 units.
explain the trends in melting points in going from the chloride to the flouride, making direct reference to the attractive forces that must be overcome to melt the solid and why their strength varies.
Backside attack on the bromonium ion by a bromide ion results in a trans products. The bromine is added to opposite sides of the carbon-carbon double bond.
A solution contains 11.00 g of unknown compound dissolved in 50.0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -6.59 *C. The mass percent composition of the compound is 38.70% C , 9.74% H , and the ..
For the blanced equation, shown below, What would be the limiting reagent if 67.6 grams of H2S were reacted with 55.9 grams of O2. 2 H2S (g) + 3 O2 (g) --> 2 SO2 (g) + 2 H2O (g)
If the freezing point constant for water is 1.86 ºC/m and assuming ideal conditions, determine the freezing point of a 0.0100 m aqueous solution of Na2SO4.
Calculate the pH during the titration of 34.5 mL of 0.507 M triethylamine, (C2H5)3N with 0.148 M HCl after 13.0 mL of the acid have been added. Kb of triethylamine = 5.2 x 10-4.
If 1.35 g of silver nitrate is dissolved in 115mL of water, and to this solution is added 5.00 mL of 1.45M hydrochloric acid resulting in the formation of a precipitant. Find the concentration of silver ions remaining in solution.
What mass of sucrose should be combined with 479 of water to make a solution with an osmotic pressure of 8.00 at 315 ? (Assume the density of the solution to be equal to the density of the solvent.)
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