DAILY QUESTION September 10, 2008 1.Given the equation: D=m/V where D is density, m is mass, and v is volume. Solve: A piece of tin has a mass of 16.52.

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Presentation transcript:

DAILY QUESTION September 10, Given the equation: D=m/V where D is density, m is mass, and v is volume. Solve: A piece of tin has a mass of g and a volume of 2.26 cm 3. What is the density of tin?

Agenda9/10/08 Daily Question Check-in Vocab Squares Check-in Concept Review pg. 1 Chapter 2 Notes –Physical Properties and Density Assignments: 1. No assignment for tonight.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical Properties Physical properties describe matter. Some physical properties of matter include shape, color, size, mass, volume, density, melting point and boiling point. Melting point the temperature and pressure at which a solid becomes a liquid Boiling point the temperature and pressure at which a liquid becomes a gas State the physical form in which a substance exists, such as solid, liquid, or gas Section 2 Properties of Matter Chapter 2

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Three States of Water Section 2 Properties of Matter Chapter 2

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical Properties, continued Density is a physical property. Density is a measurement of how much matter is contained in a certain volume of a substance. A substance with a low density is “light” and a substance with a high density is “heavy” in comparison to other substances of the same volume. Density the ratio of the mass of a substance to the volume of a substance Section 2 Properties of Matter Chapter 2

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical Properties, continued Density is often measured in units of g/cm 3 The equation for density is D = m/V Density = mass/volume The density of a liquid or solid is usually reported in units of grams per cubic centimeter (g/cm 3 ) Density of water is 1 g/cm 3 Section 2 Properties of Matter Chapter 2

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Math Skills Density If 10.0 cm 3 of ice has a mass of 9.17 g, what is the density of ice? 1. List the given and unknown values. Given: mass, m = 9.17 g volume, V = 10.0 cm 3 Unknown: density, D = ? g/cm 3 Section 2 Properties of Matter Chapter 2

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Math Skills 2. Write the equation for density. density = m/V or density = mass/volume 3. Insert the known values into the equation, and solve. D = 9.17 g/10.0 cm 3 Section 2 Properties of Matter Chapter 2 D = g/cm 3

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical Properties, continued Physical properties help determine uses. Physical properties are used to select substances that may be useful. Examples of useful physical properties include: low freezing point high boiling point water resistance flexibility electrical conductor heat conductor Section 2 Properties of Matter Chapter 2