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N2O5 decomposes following first order kinetics. If 75% of the original sample of N2O5 has decomposed after 2240 minutes, what is the value of k, the rate constant, at this temperature(in min-1)?
A hypothetical atom has four allowed energy levels. As shown in the accompanying diagram, the emission spectrum of this atom will contain six transitions, labelled A - F.
An acid solution is 0.100M in HCl and 0.210 M in H2SO4. What volume of a 0.160 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid
What are the normal boiling points of cyclohexane and toluene. Without looking up the actual value, which has a higher vapor pressure
Which one of the following compounds is the most acidic? Why? A. 1-Phenylethanol B. 2-Phenylethanol C. o-Ethylphenol D. Ethyl phenyl ether E. Nitrobenzene
Calculate the heat evolved when 306 g of white phosphorus (P4) burns in air according to the equation below.
How many moles of I2 were used in the titration? How many moles of SO2 were in the 5.00 mL sample of wine? Determine the mass of SO2 (in mg) in the 5.00 mL sample of wine. Determine the concentration of SO2 (in mg/L) in the wine.
The oxygen gas collected over water occupied 52.4mL at a temperature of 30.°C as well as a pressure of 736 torr. Compute the mass percent of NaClO3 in the original sample. At 30.°C the vapor pressure of water is 31.8 torr.
Find the pH of the equivalence point and the volume (mL) of 0.0740 M KOH needed to reach the equivalence point in the titration
What is the molar mass of the compound? Express your answer to two significant figures and include the appropriate units
Substitution and elimination reactions are competing reactions. Under what conditions can you ensure that substitution will predominate
We did an experiment in class today heating a metal object over a bunsen burner, submerging it in water and recording the temperature to see what the heat flow was.
In what form does mercury exist when it is produced during the combustion of coal?
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