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What are the products of the hot alkaline KMnO4 oxidation of the following compounds? What will be the products if cold dilute KMnO4 is used instead
Construct a rough plot of pH versus volume of base for the titration of 25.0 mL of 0.050 M HCN with 0.075 M NaOH
A student makes a mistake while preparing a vitamin C sample for titration and adds the potassium iodide solution twice. How will the larger quantity of KI influence the amount of NBS needed to titr
What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m. Assume the van't Hof
Which of the following processes is most likely to take place as a result of the influence of temperature on enzyme activity, and not because of enzyme denaturation?
Barium metal crystallizes in a body-centered cubic lattic. The unit cell edge length is 502 pm, and the density of the metal is 3.50 g/cm3. Using this information, calculate avogadro's number
A particular form of electromagnetic radiation has a frequency of 9.87x10^15Hz. What is it's wavelength in nanometers?
How many grams of potassium dichromate should be added to a 50.0 mL volumetric flask to prepare 0.025 M Potassium dichromate when flask is filled to the mark with water?
Calculate the percent ionization of benzoic acid at .250M
How much natural gas will he need to burn? Natural gas produces 49.3 of heat per gram. (For the sake of simplicity, assume that the transfer of heat is 100 percent efficient.).
Calculate the nuclear binding energy of one lithium-7.
Serotonin is biosynthesized from the amino acid L-tryptophan. Following oxidation at the 5 position of the indole ring by tryptophan hydroxylase, serotonin is generated with the assistance of the p
Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to significant digits.
A 86 gram solution of silver nitrate contains 14 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
What is the specific heat of aluminum if the temperature of a 28.4 g sample of aluminum is increased by 8.1 oC when 207 J of heat is added?
Calculate the amount of heat evolved in the oxidation of 32.0 g of Fe (Ar = 55.85 g/mol) at 25 oC and 1 atm pressure ( ΔHfo(Fe2O 3,s) = -824kJ/mol)
500cm3 of 0.250M of na2so4 is added to an aqueous solution of 15.0g of BaCl2 resulting in a white precipitate of insoluble BaSO4. how many number of moles and how many gram of BaSO4 are formed?
Calculate the equilibrium constant, Kc, she obtained for this reaction. A student ran the following reaction in the laboratory at 689 K
Rhodopsin is a biological pigment that serves as the primary photoreceptor in vision. The chromophore in rhodopsin is retinal, and the absorption spectrum of this species is centered at roughly 500.
Which half-reaction represents reduction?
At a physiological temperature of 37 C, what is the probability of rhodopsin populating the first excited state? How susceptible do you think rhodopsin is to thermal population of the excited state?
The other fails to wash the boiled cabbage with water as directed. How will the determined amounts of vitamin C per gram of boiled cabbage compare?
Nitrogen (80 kPa), oxygen (21.0 kPa), carbon dioxide (0.03 kPa), and water vapor (2.0 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa?
How many kilojoules of heat are absorbed when 7.10g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?
An unknown gas effuses at a rate of 86.6 mmol/hr. Under similar conditions, I2 effuses at a rate of 30.4 mmol/hr. What is the molar mass of the compound?