The equations given in the problem introduction can be added together to give the following reaction: overall: n2o4→2no2 however, one of them must be reversed. which one?

Reverse the  reaction

Explanation:

Reactions:

Overall:

As can be seen, in the overall reaction we have in the reactants like in the second reaction and in the products. The is in the first reaction but as a reactant so we need to reverse that reaction:

Combining:

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

c (diamond),

sio2 (quartz)