C3H8 + 5O2 --> 3CO2 + 4H2O

which chemical or element has the largest nu,ber of molecules in the above balanced equation?

Oxygen? I think

yes, there are five moles to start with. If the reaction is allowed to proceed, all the O2 will be used up, and there will be more water than anything.

Yes, you are correct. In the balanced equation C3H8 + 5O2 --> 3CO2 + 4H2O, oxygen (O2) has the largest number of molecules.

To determine the number of molecules, we look at the coefficients in front of each compound or element. In this case, there are 5 molecules of O2 on the left side (reactants) and 4 molecules of H2O on the right side (products).

Since 5 is greater than 4, oxygen has the largest number of molecules in this balanced equation.

To determine which chemical or element has the largest number of molecules in the balanced equation, you can examine the stoichiometric coefficients. In this case, the balanced equation is:

C3H8 + 5O2 → 3CO2 + 4H2O

Let's calculate the number of molecules for each chemical or element based on the stoichiometric coefficients:

- C3H8: The coefficient is 1, so there is 1 molecule of propane (C3H8).
- O2: The coefficient is 5, so there are 5 molecules of oxygen (O2).
- CO2: The coefficient is 3, so there are 3 molecules of carbon dioxide (CO2).
- H2O: The coefficient is 4, so there are 4 molecules of water (H2O).

Comparing the numbers, we can see that oxygen (O2) has the largest number of molecules with 5 molecules. Therefore, your answer is correct.