If the sum of the mass of the reactants is 12.5 what would be the sum of the products be? and explain how you know this

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus