If one atom of oxygen is neutral and another atom of oxygen is an ion do they have to differ in mass?

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

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these