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What would happen when the manganese dioxide MnO2 was added to the peroxide solution. why did this occure
the human eye is able to detect as little as 2.35 x 10 ^-18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light that can be detected by the human eye.
A 1.245 gram sample of a compound containing barium and oxygen was dissolved in hydrochloric acid to give a solution of barium ion, which was then completely precipitated out with an excess potassium chromate to give 2.012 grams of barium chromate..
If 66 ml of Ethanol (C2H5OH;D=.79 g/cc is dumped into 600 ml of water, what is the molality of the solution
what would happen to the pressure of a confined gas sample if the volume of that sample was decreased while the
A tetrapeptide is abbreviated as DPKH. Which amino acid is at the N-terminal and which is at the C-terminal. Show how to form a dipeptide aspartylserine.
How many grams of magnesium metal must be burned to release 500 kcal of heat according to the following reaction: 2 Mg (s) + O2 (g) ® 2 MgO (s) DH° = - 288 kcal
Quinine (C20H24N2O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug.
Calculate the pH of a solution prepared by mixing 300 mL of 0.25 M sodium hydrogen ascorbate and 150 mL of 0.2 M HCl plus water to a final volume of one liter. The Ka of ascorbic acid is 5 x 10-5.
what are the names of the quantity measured by each of seven SI base units and the SI symbols of the unit?
Calculate the partial pressure of each gas in the container. Express the pressure values numerically in atmospheres, separated by commas. Enter the partial pressure of methane first, then ethane, then propane.
How many moles of sodium bromide can be produced from the reaction of 1.03 moles of sodium with 0.650 moles of bromine gas? 2 Na(s) + Br2(g) > 2 NaBr(s)
When 10.0 g of calcium carbonate was mixed with 150.0 ml of 1.00 M hydrochloric acid, a gas formed. What is the theoretical yield,in liters, of the gas measured at 300 torr of pressure and a temperature of 27.0 degre celcius?
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