This constitutional amendment abolished slavery in the united states. twelfth thirteenth fourteenth fifteenth

In 1819, what did the united states obtain from spain for $5 million?

1. what was the purpose of the communist international organization?

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal