Calculate the ph for each of the cases in the titration of 25.0 ml of 0.250 m pyridine, c5h5n(aq) with 0.250 m hbr(aq) . a. before addition of any hbr 9.33 b. after addition of 12.5 ml of hbr 5.23 c. after addition of 14.0 ml of hbr 4.63 d. after addition of 25.0 ml of hbr 3.07 e. after addition of 29.0 ml of hbr

What is the number of atoms in 3.54 mol s

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.