Does 1 Milliliter Equal 1 Gram? Understanding Volume to Mass Conversion

Learn why 1 mL does not always equal 1 gram and how substance density affects volume-to-mass conversions.

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No, 1 mL does not necessarily equal 1 gram. The relationship between milliliters (mL) and grams (g) depends on the density of the substance. For water, 1 mL is approximately equal to 1 gram because its density is close to 1 g/mL. However, for substances with a density greater or less than 1 g/mL, the conversion will differ. For example, 1 mL of mercury will be heavier (about 13.6 grams) because it has a higher density.

FAQs & Answers

  1. Why doesn't 1 mL always equal 1 gram? Because the weight of 1 mL depends on the substance's density, which varies. Only substances with a density of 1 g/mL, like water, have equal volume and mass measurements.
  2. How do I convert milliliters to grams for different substances? You multiply the volume in milliliters by the density of the substance in grams per milliliter to get the mass in grams.
  3. What is the density of mercury compared to water? Mercury has a much higher density than water, about 13.6 g/mL, so 1 mL of mercury weighs approximately 13.6 grams.