73. Silicon carbide, an abrasive, is made by the reaction of silicon dioxide with graphite.
SiO2 + 3C SIC + 2CO
If 100 g of SiO2 and 100 g of C are reacted as far as possible,
which one of the following statements will be correct? (Atomic
weight (g/mol): C =12, 0 =16, Si = 28)
A. 111 g of SiO2 will be left over.
B. 44 g of SiO2 will be left over.
C. 82 g of C will be left over.
D. 40 g of C will be left over.

The answer is d.potassium

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.