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Carminic acid a naturally taking place red pigment extracted from the cochineal insect contains only carbon, hydrogen, and oxygen. It was commonly utilized as a dye in the first half of the nineteenth century. It is 53.66% C and 4.09% H by mass. A titration needed18.02 mL of 0.0406 M NaOH to neutralize 0.3602 g carminic acid. Presuming that there is only one acidic hydrogen per molecule, Explain what is the molecular formula of carminic acid?
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L?
the partial pressure of o2 in the lungs ranges from 25 mmhg to 40 mmhg. what concentration of o2 in grams per liter
Would you expect the carotenoid pigment fraction to come off sooner or later than it did with 95:5 Hexane:Acetone? What effect would you expect if you used 100% hexane instead
A 3.9-g sample of Colorado oil shale is burned in a bomb calorimeter, which causes the temperature of the calorimeter to increase by 5.0°C. The calorimeter contains 1.00 kg of water (heat capacity of H2O = 4.184 J/g°C) and the heat capacity of the..
The observed rate constant(k-observed) for one of the trials was measured to be 0.00400 s^-1. If the concentration of hypochlorite was fixed at 0.134 M, calculate the specific rate constant (k) for the trail.
In a particular experiment, 2.25 g of NH3 and 3.75 g of O2 are placed in a container and allowed to react. How many grams of NO will have been formed when all of the limiting reactant has been consumed.
If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz. Express answer in scientific notation.
A mixture intially contains A, B,C in the following concentrations: A= .700 B= .850 C=.400. the following reaction occurs and an equilibrium is established.
question you take an aspirin tablet a compound consisting solely of carbon hydrogen and oxygen with a mass of 1.00 g
what is the solubility of O2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25°C, and that the mole fraction of O2 in air is 0.209 at both 12,000 ft and at sea level.
Give the detailed reaction mechanism leading to the final product (major). Define what simple chemical test(s) would help establish that you had in fact made the desired alkenes product
Calculate the molarity of a solution made by adding 27.8 mL of concentrated hydrochloric acid (37.3 % by mass, density 1.19 g/mL) to some water in a volumetric flask, then adding water
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