Which of the following is characteristic of all reversible systems at equilibrium?
activation energy is not required.
changes do not occur at the microscopic level.
two opposing reactions occur at the same rate.
they occur in open systems.
a catalyst affects the forward reaction.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.

How is the shape of the poem “peer” connected to its meaning?