caption: an empirical formulas of the same substance in water
exif: {"Image DocumentName": "Empirical and Molecular Formulas", "Image ImageDescription": "Substance. Molecular Formula. Empirical Formula. Benzene. C6H6. CH. Acetylene. C2H2. Glucose. C6H12O6. CH2O. Water. H2O.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}