The question is incomplete, the complete question is;
Use the chemical reaction to answer the question. CaCO3 → CO2 + CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?
A. 10 grams B. 15 grams C. 30 grams D. 60 grams
When a scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction, the total mass of the products is 30 grams.
According to the law of conservation of mass, mass is neither created nor destroyed in a chemical reaction.
The simple interpretation of this law is that the total mass of reactants should necessarily be the same as the total mass of products obtained in the reaction.
We had 30grams of Calcium Carbonate (CaCO3) reacting hence we must have a total mass of 30 grams of CaO and CO2 obtained after reaction.
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That which is NOT part of the respiratory membrane of the lungs is:
- A thin layer of ciliated epithelial cells
<h3>What is the respiratory membrane?</h3>
The respiratory membrane is the surface of the lungs where there is an exchange of gases. There are many parts that make up the respiratory membrane of the lungs.
Some of these are; the respiratory mucosa, the adventitia, and the submucosa. The thin layer of ciliated epithelial cells is not a part of the respiratory membrane but is a hair-like structure that helps to remove unwanted substances from the body.
So the correct answer is: a thin layer of ciliated epithelial cells.
Learn more about the respiratory membrane here:
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