8.P.1.1:  Interactions of Matter Study Guide:                                Name: ___________________________

Density Problems:  Show your work and do not forget your unit of measurement.

1.  An object has a mass of 32.6 grams and a volume of 2.9 ml.  What is the density of the object?
2.  A cube shaped object measures 3 cm on a side.  It has a mass of 36g.  What is the density of the cube?
3. An irregular shaped object is measured in a graduated cylinder and displaces 13 ml of water.  The object has a mass of 67,6 grams.  What is the density of the object?
4. What volume would a 0.871 gram sample of air occupy if the density of air is 1.29 g/L?
5. What is the mass of a gold brick that has the following dimensions, length of 6 cm, width of 3 cm, and height of 1 cm and a density of 19.3 g/cm3?
6. A graduated cylinder is filled with water to 30.0 ml.  an irregular shaped object is submerged in the water and the water level rises to 51 ml.  the mass of the object is 239.7 grams  What is the density of the object?
7. Fill in the missing information in the chart below.

 Particle Charge Location + nucleus electron

8.  Fill in the blank with the proper vocabulary word.

1.  An ______________ is the smallest particle of an element that has the properties of that element.
2. _______________ is anything that has mass and takes up space.
3. A _________________ mixture is a mixture in which the components are physically together but not evenly distributed.
4. The ________________ is the amount of space an object takes up.
5. An _________________ is the simplest type of pure substance.
6. A __________________ is a pure substance made up of two different types of atoms chemically combined together.
7. An objects ___________ is usually measured in grams.
8. A______________________ is a combination of two or more substances that do not chemically combine.

9.  Illustrate and explain the following:

1.  Element                                        e.  compound mixture
2. Compound                                        f.  Element and compound mixture
3. Mixture:    Homogeneous
4. Mixture:  Heterogeneous

10.  Draw a picture of the arrangement of atoms for a solid, liquid and gas.  Explain how you know that this is true.

11.  What happens to the density of a substance as it changes from a solid to a liquid to a gas?

12.  Label as an element, compound or mixture.  If you put mixture, you must decide between heterogeneous and homogeneous.

1.  salt                                        d.  gold
2. pure water                                e.   blood
3. carbon dioxide                                f.  Soil

13.  How is an element identified?

14.  What are the different separation techniques and explain how each one works.

15.  Distinguish the differences between elements, compounds and mixtures.

16.  Of the following, which is an element, mixture  or a compound and why

1.    Hydrogen - H
2. K3Cl
3. H2O (water) and NaCl (Salt)