To find out how many carbon atoms are in 57 molecules of C3H7O (which is a compound containing carbon, hydrogen, and oxygen), we can use dimensional analysis. Here's how you can calculate it step by step:
1. Start with the number of molecules: 57 molecules of C3H7O.
2. Determine the number of carbon atoms in one molecule of C3H7O. There are 3 carbon atoms in one molecule.
3. Calculate the total number of carbon atoms in 57 molecules:
Number of carbon atoms = (Number of molecules) x (Number of carbon atoms per molecule)
Number of carbon atoms = 57 molecules x 3 carbon atoms/molecule
Number of carbon atoms = 171 carbon atoms
So, there are 171 carbon atoms in 57 molecules of C3H7O.