Any substance that enters into a chemical reaction is called a

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?

Which of the following statements best explains why chemistry is testable a) it can measure data by experiments b) it cannot add new evidence c) it cannot be verified d) it is biased