A "liter" is a metric system unit of measurement used to quantify the volume of a liquid substance. A "kilogram" is also a metric system unit of measurement, but it is used to quantify the mass of a substance. Volume and mass are two different properties of matter. You cannot change one property into another. Therefore you cannot "convert" liters into kilograms per se. You can however, if you also know the density of a liquid substance in addition to its liter volume, calculate the substance's mass.
Instructions
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1
Write down the substance's volume measurement in milliliter units. Example: 31 ml
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2
Write down the substance's density measurement in grams per millimeter units (g/ml). Example: 2.70 g/ml
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3
Multiply the density measurement by the volume measurement. The result is the substance's mass measurement in gram units. Example: 2.70 * 31 = 83.7 g
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4
Divide the result by 1000 to convert the grams to kilograms. The result is the approximate (kilogram) mass for the given volume and density amounts.
Example: 83.7 / 1000 = 0.0837 kg