Hi there!
Photosynthesis involves carbon dioxide (CO2) and water (H2O) as the reactants with glucose (C6H12O6) and oxygen (O2) as the products. We can write a basic chemical equation:
![CO_(2) + H_(2) O - (light) -> C_(6) H_(12) O_(6) + O_(2)](https://img.qammunity.org/2021/formulas/biology/college/ji43sa1z4bkah8ha1bhwn7frpfjsgewj4k.png)
The equation has to be balanced, so the final equation for photosynthesis would be:
![6CO_(2) + 6H_(2) O - (light) -> C_(6) H_(12) O_(6) + 6O_(2)](https://img.qammunity.org/2021/formulas/biology/college/4h4fl8w59xenkpaqzpx681pv1x8bpx2utf.png)
The chemicals in correct order are:
![CO_(2)\\H_(2)O\\ C_(6)H_(12)O_(6)\\ O_(2)](https://img.qammunity.org/2021/formulas/biology/college/ete5celw6b51dwc9xnyp150rhicdkeekqx.png)