Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O) to form 10 molecules of carbon dioxide (CO2). According to the law of conservation of matter, how many atoms are present in this reaction?
30 atoms (10 atoms of C and 20 atoms of O).
Which procedure could be used to demonstrate that matter is conserved during a chemical change or reaction?(1 point)
Responses
Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
Find the mass of a stick of butter. Heat the butter until it melts. Find the mass of the melted butter.
Find the mass of a stick of butter. Heat the butter until it melts. Find the mass of the melted butter.
Find the mass of a piece of paper. Tear the paper into smaller pieces. Find the mass of the pieces.
Find the mass of a piece of paper. Tear the paper into smaller pieces. Find the mass of the pieces.
Find the mass of a log. Burn the log until it turns to ash and smoke. Find the mass of the ash.
According to the law of conservation of matter, the total number of atoms before and after a chemical reaction should remain the same.
In this case, we have 10 atoms of carbon (C) and 20 atoms of oxygen (O) before the reaction.
After the reaction, we have 10 molecules of carbon dioxide (CO2). Each molecule of carbon dioxide (CO2) contains 1 atom of carbon (C) and 2 atoms of oxygen (O).
Therefore, the total number of atoms after the reaction can be calculated as follows:
Number of carbon atoms = 10 molecules × 1 atom/molecule = 10 atoms
Number of oxygen atoms = 10 molecules × 2 atoms/molecule = 20 atoms
Hence, there are a total of 10 + 20 = 30 atoms present in this reaction.
To find out how many atoms are present in this reaction, we need to consider the number of atoms in each molecule involved.
In the reactants:
- There are 10 atoms of carbon (C) present.
- There are 20 atoms of oxygen (O) present.
In the product:
- Each molecule of carbon dioxide (CO2) consists of one carbon (C) atom and two oxygen (O) atoms.
- Since there are 10 molecules of carbon dioxide formed, there are 10 carbon (C) atoms and 20 oxygen (O) atoms in total.
So, in this reaction, the total number of carbon (C) atoms is 10, and the total number of oxygen (O) atoms is also 20.
Therefore, there are a total of 10 carbon (C) atoms and 20 oxygen (O) atoms present in this reaction.