Density and Specific Gravity

What is mass?

the quantity of matter in a object; units g or kg

What is volume?

The measurement of the amount of 3d space an object or substance occupies

What is density?

The quantity of matter per unit of a object or substance

Why is density important?

Density helps us to determine the composition of a substance or object

What is an intensive physical property? Give an example.

It does not depend on the size of the sample, it remains the same; density

What is an extensive physical property? Give an example.

It depends on the size of the samples; mass

What is specific gravity?

The ratio of the density of one substance to that of a reference substance under the same conditions

At what Celsius temperature is the density of water 1.00 g/mL?

4 C

What is the density of water at room temperature?

.998

1.00 mL = ___ cm3

1

Liquid volume is usually measured in

mL

Solid and gaseous volumes are usually measured in

cubic meters

Is the density of a solid or liquid significantly affected by changes in pressure or temperature? Explain.

No, because their particles are closely packed together

Is the density of a gas significantly affected by changes in pressure or temperature? Explain.

Yes, it’s particles are spread far apart and can be easily compressed

What is the density of a cube of this material at room temperature with a measurement of 3.00 cm and a mass 1.87 g?

0. 623 g/cm

Why did the Hindenburg float in the air?

because the density of hydrogen is less than the density of air