- Physical Sciences
reactions that either simultaneously occur in both directions or that can be reversed by changing the conditions of the reaction
SystÃ¨me International dâUnitÃ©s. Internationally agreed coherent system of units: distance in...
a reaction in which more energy or heat is released than absorbed when the reaction takes...
reactions in which bonds break to form products with unpaired electrons.
the part of the Earth and its atmosphere in which life can exist.