Calculate the pOH of a solution that results from mixing 45.8 mL of 0.15 M ethylamine (C2H5NH2) with 16.5 mL of 0.13 M C2H5NH3Cl. The Kb value for C2H5NH2 is 6.5 x 10-4.

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Using the thermodynamic information in the aleks data tab, calculate the standard reaction free energy of the following chemical reaction: →+p4o10s6h2ol4h3po4s round your answer to zero decimal places.