What does Mark Twain satirize in this excerpt from "The £1,000,000 Bank-Note"?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which substances have the lowest melting points: ionic covalent, or metallic

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1