Q:

# How heavy is water?

A:

At sea level, 1 liter of water weighs 1 kilogram. At higher temperatures, there are fewer water molecules in a given volume and water is less dense, so 1 liter of water weighs slightly less than 1 kilogram.

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Having substrates or salt in the water also influences the weight of water. The mass of the substrate determines how much the water's weight is increased. Since water dissolves more substances than any other liquid, having other compounds suspended in water is common. The molar mass of water is calculated by adding the molar mass of one oxygen and two hydrogen atoms. The molar mass of oxygen is 16 grams, and the molar mass of hydrogen is 1.008 grams. Calculating 16 + 2(1.008) gives water's molar mass of 18.016 grams.

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## Related Questions

• A:

The boiling point of water is 100 degrees Celsius or 212 degrees Fahrenheit at one atmosphere of pressure or at sea level. However, at high altitudes, like on a mountain, water boils at a lower temperature. When atmospheric pressure increases, water boils at a higher temperature.

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• A:

A fathom of water is 6 feet deep. Originally the term came from the Anglo-Saxon word "faetm," which means "to embrace." Back then, measurements were calculated using the average size of parts of the body, so a fathom was the distance between a man's outstretched arms from fingertip to fingertip.

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• A:

Water boils at 100 degrees Celsius because, at that temperature, its vapor pressure equals the pressure of the surrounding atmosphere at sea level. The molecules of liquid are moving too energetically for the outside pressure to keep them in the liquid at boiling temperature.