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Earth Atmosphere is relatively thin shell. Half the mass of the atmosphere is within 5 Km (3.1 miles) of the surface, and 90 percent is within (12.4 miles). Twenty km is not very far-about a 10-minutes drive on most interstate highways. By comparison Earth's radius is 6,378 km (3963 miles).
Question 1: What percent of the Earth's radius is 20 kilometers?
A sample of 1-naphthoic acid is contaminated with a small amount of sand and NaCl. Using active extraction (changing the polarity) and a gravity filtration to remove a component, describe how you would obtain pure naphthoic acid from this mixture.
What are the metric and American engineering units of the diffusion constant?
Calculate the composition of the exhaust gases in kg/hr and calculate the percentage of benzene that is partially combusted.
An acre of corn can produce about 375 gallons of ethanol, using only the kernel of the corn for conversion to ethanol. Assume the energy input to produce an acre of corn is 15000000 kJ.
compute the amount of heat needed to completely sublime 43.0 grams of solid dry ice at its sublimation temperature. the
Methyl salicylate (oil of wintergreen) is prepared by heating salicylic acid (C7H6O3) with methanol (CH3OH) C7H6O3 + CH3OH ® C8H8O3 + H2O What is the percent yield if reaction of 8.244 g of salicylic acid with an excess of methanol produced a meas..
Draw the Mechanism of N-Acetylglucosamine hydrolysis. a) under alkaline conditions and b) under acidic conditions
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
Calculate pFe2 at each of the following points in the titration of 25.00 mL of 0.02075 M Fe2 by 0.03616 M EDTA at a 6.00 pH:11.50 mL,
Explain what is the membrane potential in milivolts due to Na+ ions if the extracellular Na+ ions is 154 mM as well as the intracellular concentration of Na+ ions is 31 mM at 20 degree Celsius
A student stopped her oxalic acid titration the instant she saw a faint pink color in the solution. But she failed to swirl the solution properly, so she didn't realize that the pink color would have disappeared.
Explain how would you expect the conductivity of the solution to change during the titration of a strong acid with a strong base. Explain How would expect the conductivity of the solution to change during the titration of a weak acid with a strong..
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