Which is proof of any synthesis reaction, a chemical change has occurred? a. in a synthesis reaction, two reactants combine to form a new compound b. many synthesis reactions involve a a phase change c. in a synthesis reaction, oxygen is always converted to carbon dioxide d. all reactions are exothermic

it was spontaneous.

"ain't i a woman? " is the name given to a speech, delivered extemporaneously, by sojourner truth, (1797–1883), born into slavery in new york state.sojourner truth' delivered her famous speech "ain't i a woman? " (which did not have a title at that moment) was given without any previous preparation. her dissertation took place at the women's convention in akron, ohio, in 1851.