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5.0 kg of hydrogen is reacted with 31 kg of oxygen. The experiment yields 28 kg of water. Calculate the percent yield of the reaction.
80. %161%63 %40. %90. %
Ultraviolet light with a wavelength of 200nm is incident upon gold surface in a vacuum chamber. What is teh wavelength of the most energetic electrons that are ejected from the surface?
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.200 M sodium benzoate. How much of each solution should be mixed to prepare this buffer
Give the repeating unit of the polymers prepared by ADMET polymerization
How many silver atoms are in a single nanoprisms with an edge length of 45nm and a length of 5 nm. the density is 10.5 g/cm3
A 115 mL sample of a 11.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.40 L.What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.)
Why does benzyl alcohol, a primary alcohol, react rapidly in the presence of HCl to form benzyl chloride? If it's primary, shouldn't the reaction be slow?
in the electrolysis of a sodium chloride solution, what volume of H2 is produced in the same time it takes to produce 257L of Cl2, with both volumes measured at 50 celcius degrees and 2.50atm
How many total moles of ions are released when each of the following samples dissolves completely in water
Over the time interval 300 to 400 seconds, the rate of reaction with respect to A is delta[A]/delta t =3.7 x 10^-5M/s. Over the same time interval what is the rate of reaction with respect to B,
Explain what a hydrogen bond is and describe, on the molecular level, how a water and an alcohol molecule can hydrogen bond
How many grams of methane must be combusted to heat 1.15 of water from 26.0 to 89.0, assuming as a product and 100% efficiency in heat transfer
Why is it necessary to add sodium chloride to the steam distillate before carrying out ether extraction
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