Answer:
Temperature gradient = 30
90F - 60F = 30F
The temperature gradient is 30F.
If I am right, let me know.
He was involved in the mapping of venus and mars
The compound that could serve as a reactant in the neutralization reaction is H2SO4
Explanation
Neutralization reaction occur between an acids and a base. H2SO4 ( sulfuric acid) is a strong acid. It can be neutralized by strong base such as NaOH ( sodium hydroxide)
Example of neutralization reaction is
2NaOH + H2SO4 → Na2SO4 + 2H2O
The answer is the last option.