introduction to matter lecture: calculating density

ntroduction to Matter Lecture: Calculating Density

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Introduction to Matter

Lecture: Calculating Density

Introduction to Matter

A solid is a substance that has a definite shape and volume.

Introduction to Matter

Density: The amount of mass per volume of an object.

D = m / V

D= Density

m= mass

V= Volume

Introduction to Matter

Density Units.

Solids: g/cm3

Liquids and gases: g/ml

Introduction to Matter

Calculating Density

A small block of wood floats on water. It has a mass of

200 g and a volume of 250 cm3. What is the density of the wood?

Read and Understand

What information are you given?

Mass of block = 200 g

Volume of block = 250 cm3

- Measuring Matter

Introduction to Matter

Calculating Density

A small block of wood floats on water. It has a mass of

200 g and a volume of 250 cm3. What is the density of the wood?

Perform the calculation.

Density = Mass/Volume = 200 g/250 cm3

= 0.80 g/cm3

- Measuring Matter

Introduction to Matter

Calculating Density

Practice Problem

A sample of liquid has a mass of 24 g and a volume of 16 mL. What is the density of the liquid?

1.5 g/mL

- Measuring Matter

Introduction to Matter

Calculating Density

Practice Problem

A piece of solid metal has a mass of 43.5 g and a volume of 15 cm3. What is the density of the metal?

2.9 g/cm3

- Measuring Matter

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