Selena constantly thinks about climbing up the stairs to the roof of her building and jumping into the street below. selena's uncontrollable thoughts could be considered an example of

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.