You have been given a mixture of water and a unknown solid substance. your teacher asks you to perform a heating process to determine what the unknown substance is. when the temperature reaches 100 °c, the water begins to boil and you are left with a white crystalline substance. when your thermometer reaches 200 °c, everything in the container becomes a liquid. what is the unknown substance? a) lead b) aluminum c) table salt d) table sugar

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.