To convert 500 milliliters (ml) to grams, we need to know the density of the substance being measured.
For water (and substances with similar density), 1 ml = 1 gram. So, 500 ml of water would weigh 500 grams.
For other liquids or materials, the conversion depends on their specific density. If you’re referring to a different substance, let me know and I can help with that too!