What effect would the nonreversible decomposition of acetoacetic acid have on the concentration of 3-hydroxybutyric acid? (i. e. would it go up or down)

Molarity is moles of solute over liters of solution. idk if that is what you are talking about, but you can convert moles of solute to grams of solute using dimensional analyzes by using molar mass found on the periodic table.

Is there any options, for this

  you would need a flashlight, escape plans, canned foods, blankets, phone, car, money, clothes, and some more things that you think would be to get you out of the disaster safe and soundhope.  this : )