Moles of N2O5 = moles of NO2 * ( 2 moles of N2O5 / 4 moles of NO2
Number D both H and OH ions
During the dark ages-All that wasn't around the christian religion were lost. Knowledge and discoveries before the Dark Ages were mainly in Greek ideas. Biblic scripts however were in Latin. Therefore all inventions up to the dark ages were lost and only religious scripts preserved in the churches. Outside the church, no one knew how to write, read or even communicate.
I believe the answer is B. a million or more.
The answer is: [D]: a reactant.
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