To 100.0 mL of a solution that contains 0.120 M Cr(NO3)2 and 0.500 M HNO3 is added 20.0 mL of 0.250 M K2Cr2O7. The dichromate and chromium (II) ions react to give chromium (III) ions. (a) Write a balanced net ionic equation for the reaction. (b) Calculate the concentrations of all ions in the solution after reaction.

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

it's c. elements are placed in rows based on how may valencies electrons have.