Question

Joan uses a model to show how wood burns at the level of atoms and molecules. Her model tracks 840 carbon atoms that make up a small fraction of a wood sample. The table shows how the carbon atoms are converted into carbon dioxide as the wood burns over time. Which of the claims about the burning wood is supported by Joan's model?
A. matter is conserved during the burning of wood

B. chemical energy is conserved during the burning of wood

C. burning wood in bossier series of chemical reactions that occur in one direction only

D. burning wood involves a series of chemical reactions that occur in both the forward and reverse directions

E. burning wood involves oxygen as well as carbon

Answer 1

Answer:

The correct option is A. Matter is conserved during the burning of wood

Explanation:

One of the major theories of matter states that the amount of mass at the start of a reaction is equal to the amount of the mass at the end of the reaction.

As in Joan's study, he shows that the amount of carbon atoms remain 840 during each of the combustion reactions. The number of carbon atoms in wood at the start of the reaction was equal to the number of carbon atoms in carbon dioxide at the end of the reaction. Hence, Joan's model supports the theory that matter is conserved during the burning of the wood.