Science Assessment ~ Topics ~ Substances, Chemical Reactions, and Conservation of Matter ~ Misconception SCM029

Mass is not conserved during processes in which gases take part (Mas et al., 1987; Berkheimer et al., 1988; Hesse et al., 1992). If a gas is produced during a chemical reaction that takes place in a closed system, the total mass decreases (Ozmen et al., 2003).

Items that test for misconception SCM029 in this project (Original Project) and key idea (Whenever substances within a closed…)
Item ID Number	Item Description	How Often the Misconception was Chosen	Select This Item for My Item Bank
SC077005	If a chemical reaction occurs between two liquids in a sealed jar, the mass will not change if a gas is formed, and it will not change if a solid is formed.	52%

Items that test for misconception SCM029 in this project (Original Project) and other key ideas
SC092004	When a liquid changes to a gas in a sealed container and the number of atoms stays the same, the mass of the jar and everything in it also stays the same.	30%