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Why is normal phase chromatography ideal for separating the components (chlorophyll a, b, and carotene) in a petroleum ether spinach extract? (why not reverse phase?)And why was it important for the sample that was loaded into the chromatography column to be concentrated to 1mL, as opposed to putting in the 10mL diluted solution?
calcium carbonate or limestone is relatively insoluble in water. at 25?c only 5.8 mg will dissolve in 1.0 liter of
A 2.60-L vessel contained 0.0160 mol of phosphorus trichloride, 0.0115 mol of phosphorus pentachloride, and 0.0903 mol of chlorine at 180°C in an equilibrium mixture. Calculate the value of Kc for the following reaction. PCl3(g) + Cl2(g) PCl5(g)
Write the balanced complete ionic equations and net ionic equations for the reactions that occur when each of the following solutions are mixed. AgNO3(aq) and K2SO4(aq)
A 141-mL sample of gas is collected over water at 22°C and 753 torr. What is the volume of the dry gas at STP?
Water treatment plants commonly use chlorination to destroy bacteria. a byproduct is chloroform- CHCl3, a suspected carcinogen. This is produced when HOCl, formed by reaction of Cl2 and water
how many milliliters of 0.54M HCL solution are needed to react completely with 4.6g of zinc to form zinc (II) chloride?
which stting material in the reaction if the limiting reactant and which material is present in excess? show
A mixture of helium and neon gases is collected over water at 28.0 C and 745 mmHg. if the partial pressure of helium is 368 mmHg, what is the partial pressure of neon?
A 12.0 g sample of solic NH4Cl is heated in a 5.00 L container to a high temperature. At equilibrium, the pressure of NH3 (g) is 1.22 atm. What is the value of Kp for the reaction
the experiment utilized only metal-metal ion redoxcouples. is it possible to determine the srp for non-metalsand their
Hydrogen has an electronegativity value between Boron and carbon and identical to phosphorous. With this in mind, rank the following bonds in order of decreasing polarity
Consider the following compounds and suppose that 0.5M solutions are prepared of each:Nal, NH4Br, KF, KCN, KC2H3O2, CsNO3, and KBr. Write the formulas of those that have solutions that are A) acidic B)basic and C) Neutral
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