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The radius of a typical human eardrum is about 4.0 mm. Find the energy per second received by the eardrum when it listens to sound that is (a) at the threshold of hearing and (b) at the threshold of pain. (The intensities for the threshold of hearing and pain are: 10^-12 W/m^2 and 1 W/m^2).
Calculate the altitude at which only 10% of the mass of the atmosphre is above and 90% of the mass of the atmosphere is below.
Based on the stereochemistry of the addition of bromine to cinnamic acid write the structure of dibromide product(s) that you think will be formed as the result of the reaction of Z-2-pentene with bromine.
In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?
Problem- The equilibrium constant, K, for a neutralization reaction can be symbolized as Kn. Using Kw, Ka, and Kb values, determine Kn for the following reaction at 25° C.
When dissolved in your stomach (pH=1) the concentration of aspirin (acetylsalicylic acid Ka = 3.0 x 10 ^-4) is 0.2 M. Calculate the % ionization of the aspirin.
Any help on this problem would be appreciated! Not quite sure how to to use the solubility values in this problem. How can we determine the how many grams will crystallize
The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-fourth of the original. What is the final volume of the gas?
calculate the amount of 0.020 m kmno4 solution required to completely oxidize 37.99 ml of .100 m feso4 in an acidic
How to Name and Define Acids, How can you know that HNO3 is nitric acid and HNO2 is nitrous acid? How do you know the difference in endings?
An industrial hygiene survey has been conducted to determine whether exposure of workers to ethyl benzene (molecular weight 106) exceeded the OSHA PEL of 100 ppm.
Draw all stereoisomers of pentane-1,2,3,4,5-pentaol. You should find two meso structures and one pair of enantiomers. Use bold and hashed wedges to show the stereochemistry.
How many chemicaly different hydrogens are in: 4'-Aminoacetophenone; 3'-aminoacetophenone; benzoic acid; 3-toluic acid;1,4-dimethoxybenzene; and fluorenone? alson how would you do a predicted chemical shift and splitting pattern for those
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