On the pressure that a gas inserts in a sealed container changes from 22.5 psi to ? psi the temperature changes from 110c to 65 c

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