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What are some differences between a longitudinal wave and a electromagnetic wave?
calcualte the pH at one-half the equivalence pont and at the equivalence point for a titration of 50 mL of 0.100M acetic acid with 0.100M NaOH
a radio stations channel such as 100.7 fm or 92.3 fm is actually its frequency in megahertz rm mhz where 1 rm mhz106 rm
Ocean water typically contains approximately 35 moles of salt ions dissolved in each 1000 moles of water. Assuming that ocean water has the same density as pure water, use this ratio to determine the molarity of the solution and then calculate ..
The skeletal structure of one molecule is included to indicate the proper format; modify the X\'s on the given structure to create the first stereoisomer
given that the heat of fusion of water is -6.02 kjmol that the heat capacity of h2o l is 75.2 jmolk and that the heat
Problem- A sample of Br2(g) takes 24.0 min to effuse through a membrane. How long would it take the same number of moles of Ar(g) to effuse through the same membrane
What is the density of a sample of air (average molar mass is 28.8 g/mol) that has a pressure of 750torr and a temperature of 27 degrees C?
Calculate the concentration of sulfide in the sample? A similar 10.0-mL sample plus 1.00 mL of 0.030 M sulfide diluted to 25.0-mL give a reading of -224.0 mV
Calculate the volume of 0.500M hydrochloric solution that must be added to 20.5g of sodium ethanoate to make 500cm3 a buffer of pH4.50.The pKa value of ethanoate acid is 4.76.
A stock solution is prepared by adding 24 mL of 0.4 M Na3PO4 to enough water to make 76 mL. What is the PO43- concentration of 25 mL of the stock solution
Compute the individual concentrations of HMR and MR in a mixture measured with absorbency 0.604 at 520 microns as well as absorbency 0.727 at 425 microns.
How many half lives will it take the c4h6 to decrease to 3.1% of its original concentration? the relationship of At/ A0= 0.50
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