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A drum of a nonflammable, water-insoluble liquid was identified at a fire scene. A sample of the liquid collected from a drum weighs 1.5 lb. and occupies a volume of 0.15 gal. What is the specific gravity of the liquid?

Sagot :

The specific gravity of the liquid is 1.2

Specific gravity of a substance can be calculated using the formula

[tex]Specific \ gravity = \frac{Density \ of \ substance}{Density \ of \ water}[/tex]

First, we will determine the density of the liquid

Density is given by the formula

[tex]Density = \frac{Mass}{Volume}[/tex]

From the question,

The mass of the liquid = 1.5 lb

The volume occupied by the liquid = 0.15 gal

∴ The density of the liquid is

[tex]Density = \frac{1.5}{0.15}[/tex]

Density of the liquid = 10 lb/gal

(NOTE: Density of water = 8.34 lb/gal)

∴ [tex]Specific \ gravity \ of \ the \ liquid =\frac{10 \ lb/gal}{8.34 \ lb/gal}[/tex]

Specific gravity of the liquid = 1.199

Specific gravity of the liquid ≅ 1.2

Hence, the specific gravity of the liquid is 1.2

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