Suppose 10 atoms of carbon c react to 20 atoms of oxygen o to form 10 molecules of carbon dioxide CO2 according to the law have come salvation of matter how many atoms are present in this reaction 15 10 30 20
In this reaction, 10 atoms of carbon (C) and 20 atoms of oxygen (O) react to form 10 molecules of carbon dioxide (CO2).
Each molecule of carbon dioxide contains 1 atom of carbon and 2 atoms of oxygen.
Therefore, in 10 molecules of carbon dioxide, there are 10 atoms of carbon and 20 atoms of oxygen.
So, the total number of atoms present in this reaction is 10 + 20 = 30.
Hence, the correct answer is 30.