When k2cr2o7 is cooled from 80c to 20c how much solute will precipitate out of the solution

uranium-238 i believe is your answer

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

answer; 4 electrons;