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A sample in a 1.0 mm cell absorbs 75.0% of the incident light at 510 nm. If the solution is 0.075 M, its molar absorptivity (M-1 cm-1) is:
To qualify to run in the 2005 Boston Marathon, a distance of 26.2 miles, an 18 year old woman had to have competed another marathon in 3 hours and 40 minutes or less. To qualify, what must a woman's average speed have been
Calculate the molecular weight of the compound? Given that Kf=1.86 and the compound in not ionic.
How many Joules are required to heat 2 L of water in a pot from 20 degree C to the boiling point of water? The specific heat of water is 4.18 J/g. Degree C and the density of water is 1 g/mL
The mass spectrum of an organic compound shows the relative abundance of M to be 34.29% and M+1 to be 8.901%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundance: 12C is 98..
Write an equation for this reaction? which species acts as the nucleophile? Which species acts as the electrophile?
Assume that the complete combustion of one mole of ethanol to carbon dioxide and water liberates 1370 kJ/mol (?G°\' = -1370 kJ/mol). If the energy generated by the combustion of ethanol is entirely converted to the synthesis of a hypothetical comp..
A 670 mL gas sample at STP is compressed to a volume of 284 mL, and the temperature is increased to 20C. What is the new pressure of the gas in Pa? Answer in units of Pa.
Calculate the mass of pure silver that when heated from 12.0 degrees celcius to 15.2 degrees celcius it required 1.25 kj of energy
The annual production of zinc sulfide (ZnS) is 3.5 10^4 tons. Estimate the number of tons of SO2 produced by roasting it to extract zinc metal.
Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
Consider a particle with quantum number n moving in a one-dimensional box of length l. Determine the probability of finding the particle in the left quarter of the box.
As a solid, Ag adopts a face-centered cubic unit cell. How many unit cells are present per cubic centimeter of Ag
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