1. Iron (II) in aqueous solution can be quantitated by an oxidation-reduction process using dichromate, Cr2O72-: Cr2O72-(aq) 6 Fe2 (aq) 14 H (aq) 2 Cr3 (aq) 6 Fe3 (aq) 7 H2O(l) Write the balanced half-reactions for the oxidation of iron (II) and the reduction of dichromate.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

answermeridional ;