Why Does 1 mL of Water Weigh Exactly 1 Gram at 4°C?
Discover why 1 mL of water weighs 1 gram at 4°C due to water's density and the metric system's design for easy measurement conversions.
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1mL of water at 4°C weighs 1g because of the density of water. The metric system was designed with water as a basis, so when you measure 1mL of water, this volume is equivalent to the weight of 1g at its maximum density, which occurs at 4°C. This relationship simplifies conversions in the metric system, making it convenient for scientific and everyday measurements.
FAQs & Answers
- Why is water's density highest at 4°C? Water reaches its maximum density at 4°C because of the molecular arrangement that packs water molecules closest together at this temperature.
- How does the metric system relate volume and mass? The metric system uses water as a standard, defining 1 milliliter of water as equivalent to 1 gram in mass at its maximum density, simplifying volume-to-mass conversions.
- Can 1 mL of other liquids weigh 1 gram? No, 1 mL of other liquids generally weighs different amounts because their densities vary; the 1mL = 1g relationship is unique to water at 4°C.