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What if sulfanlic acid sodium nitrate and 1-naphthylamine are made soluble in water in three different volumetric flask in presence of HCL then mixed together. A color is originated. what does the color reflects ?is it a dye or something else?
Calculate the number of moles of ions present in 58.5 g of a solution that is 8.68% Fe2(SO4)3 by mass. a) There are 0.0635 moles of ions in this solution. b) There are 0.0127 moles of ions in this solution.
An aqueous potassium nitrate solution has a freezing point of -2.0 °C. How many moles of potassium nitrate are contained in 0.5 kg of water in this solution? The freezing point depression constant for water is -1.86 °C/m.
Alpha helices are a type of secondary structure in proteins. What is the length of a 23-kDa single-stranded ?-helical protein segment
What is the change in internal energy (in J) of a system that absorbs 6.03 kJ of heat from its surroundings and has 4.70 kcal of work done on it? 1 kcal = 4.184 kJ
In the microscale oxidation of a Xylene to a Phthalic Acid, 825 mg potassium permanganate, 100 mg sodium carbonate, 3 mL water were put in flask and warmed then 125 microliters of unknown xylene and 10 mg detergent were refluxed for 45 minutes.
Please use the information given regarding molybdic acid. Molybdic acid is diprotic acid with the formula, H2MoO4. The values of Ka1 and Ka2 are approximately 6.3 X 10^-5 and 6.3 X 10 ^-9. Calculate the approximate pH of a 0.750M H2MoO4 solution.
What is the significance of high pressure used in HPLC?
Calculate the maximum concentration of fluoride ion that could be present in hard water. Assume the only anion present that will precipitate is the calcium ion. (CaF2(s) Ksp,25C=4.0x10^-11)
Calculate the wavelength at which they are broadcasting.
The standard molar entropy for Br2(g) is 245.46 J/(molK) at 25?C. Given that ?S? = 104.58 J/K for the dissociation of one mole of Br2(g) into Br(g) at 25?C, find the standard molar entropy for Br(g) at 25?C.
Sodium has a density of 0.968g/cm3 and crystallizes with the body-centered cubic unit cell. Calculate the radius of a sodium atom.
Which of the following statements correctly define SI base units and derived units in science? SELECT ALL THAT APPLY. 1. Derived units are nonmetric units. 2. The base units are the same as the decimal prefixes. 3. All that base units are metric u..
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