What kind of information did sputnik i and ii provide?
a.
information about earth’s outer atmosphere
b.
the temperature at the sun’s core
c.
the composition of the martian surface
d.
the approximate age of the moon

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

explanation:

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