Q:

What is the ratio of mass to a volume of substance?

A:

Quick Answer

The ratio of mass to volume of a substance is called density. Units of measure for density include kilograms per meter cubed and grams per centimeter cubed.

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Full Answer

Density of a substance is a useful property as it determines whether the substance can float on water. If the density of a substance is less than the density of water, it floats on water; else, it sinks. The density of water is 1 gram per centimeter cubed. It is used as a standard in calculating relative densities of various substances. Relative density is defined as the ratio of the density of a substance to the density of water.

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Related Questions

  • 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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  • Q:

    What is the formula that indicates that volume equals mass divided by density?

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    The formula for density, which is mass divided by volume, can be manipulated to have the volume as the unknown. Given the mass and the density, the volume can be found by dividing the mass by the density.

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  • Q:

    How do you use mass (in mg) to determine volume occupied?

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    To use the known mass of a substance to calculate the volume occupied by that substance, divide the mass by the density of the substance. The units in which density is expressed must be the same as those used to measure mass and the volume.

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  • Q:

    How are mass and weight alike?

    A:

    Mass and weight are related in that mass is an important factor in calculating weight, but they are not alike. Mass is the amount of material present in any object, while weight is the measurement of the force with which gravity acts upon the object.

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