The following reaction describes the process of removing silver tarnish, Ag2S(s), by soaking the item in a hot baking soda solution in which the container is lined with aluminum foil. 3Ag2S + 2 Al(s) + 3H2O(l) 6Ag(s) + Al2O3(s) + 3H2S(aq)
The baking soda acts to remove impurities on the surface of the aluminum foil and to improve the conductivity of the solution.
Identify the substance that is oxidized.
Identify the substance that is reduced.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

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.