Q:

How much does a liter weigh?

A:

Quick Answer

A liter is the metric unit of volume, not of mass or weight. The weight of a substance occupying 1 liter depends entirely on its density. For example, water has a density of approximately 1 gram per milliliter; hence, 1 liter of water weighs about 1 kilogram, or 2.2 lbs.

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Full Answer

Metals are generally far more dense than water. Gold has a density of 19.3 grams per milliliter (or cubic centimeter), according to Elmhurst College. One liter of gold contains 19,300 grams (or 19.3 kilograms) of this element. Consequently, a liter of gold weighs almost 20 times more than a liter of water.

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  • Q:

    How do you convert 15 ml to grams?

    A:

    As grams are a unit of mass and milliliters are a unit of volume, you need to know the density of the substance you are measuring in milliliters in order to convert the measurement from milliliters to grams. In the case of water, 1 gram = 1 milliliter, so 15 milliliters of water = 15 grams.

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  • Q:

    What is mass per unit volume?

    A:

    Density is mass per unit volume, and the SI (or Systeme International) unit is kilogram per cubic meter, abbreviated as kg/m^3. This means that finding the density of a particular object requires dividing its mass by its volume.

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  • Q:

    Why do chemists use the mole?

    A:

    Chemists use the mole unit because, in chemistry, it is often important to speak in terms of number of atoms or molecules rather than in terms of mass or volume. However, it is difficult and inconvenient to directly speak in absolute number of atoms. The mole also provides an easy base from which to convert to units of mass and back again.

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  • Q:

    What is the relationship between mass and density?

    A:

    Density and mass are mutually dependent physical properties, with density being equal to the amount of mass per unit of volume of any particular object or substance. The mass of any object depends entirely on its overall density, with denser objects having greater mass, for the same volume, than less-dense objects. The mass of an object with uniform composition changes if pieces are added or removed, but its density remains constant. Meanwhile, barring any melting or evaporation, the density of an object tends to change with changes in temperature, while the mass remains the same.

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