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The absorbance of four standard Fe2+ solutions were measured to get a calibration curve that gave the subsequent best fit line
y = 0.2432x + 0.00843
Explain what is the concentration of Fe2+ (ug/mL) in a solution whose absorbance is 0.638.
What mass (in grams) of solid KCl would need to be added to 500 grams of water to make an ideal solution with a boiling point
If 2.55 g of NaOH were added to a 100.0 mL solution containing 0.10 M Ca(NO3)2, what concentration of Ca 2+ remains in solution?
Write the chemical equation for the reaction of carbonic acid (H2CO3) with water. Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.
Calculate the concentration of ALL species in a 0.25 M solution of ethylammonium chloride (EtNH4Cl). The Kb value for the weak base ethylamine (EtNH2) is 5.6 x 10
a 365.0g sample of water,contains 23mg Au. How much gold is present in the sample in parts per million?
For the molecule shown below, choose all the statements that are true. Soluble is where at least 10 drops of the compound can be added to a particular solvent (in this case, water or hexane-- CH3CH2CH2CH2CH2CH3) and the result is one homogeneous l..
Calculate the number of grams of urea that must be added to 150 g water to give solution whose vapor pressure is 2.5 mmHg less than that of pure water at 40 degrees C
Explain why must the reaction of both the pure copper as well as the brass sample with nitric acid be done in the hood
which of the following transition metal complexes is diamagnetic?
High-purity benzoic acid (C6H5COOH; delta H rxn for combustion= -3227 KJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter
A student takes 195. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Sulfuric acid is mixed with aqueous sodium hydroxide to produce water and sodium sulfate. Liquid C6H12 is burned in air.
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