Cr2O72- + 6S2O32- + 14H+ —> 2Cr3+ + 3S4O62- + 7H2O ___ is reduced in the above reaction.

A. S2+

B. Cr6+

C. H+

D. O2-

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

elements make up everything, and they combine to make compounds.

the answer is c

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.