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Chemistry Name _________________________ Unit 1 Review Date __________________________ Unit 1 test will cover material on pages 3-22 of your ISN. The test will have the following types of questions:

• Matching • Multiple Choice • Open-Ended Questions • Lab type questions • Calculations

Remember to bring your calculator. Also, remember to bring your ISN. All ISNs will be collected and graded.

1. Define matter. Anything that takes up space (volume) and has mass.

2. For each of the following words, place them in the correct column of the table below.

air magnetic field car feeling heat human body

light radio Thought flashlight textbook

Matter Not Matter Air Magnetic field Car Feeling

Human body Heat Radio Light

Flashlight Thought textbook

3. What are the steps of the scientific method?

State the problem. Perform Research Make a hypothesis Perform experiment Collect Data Analyze Data Conclusion

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Match the items in column A with column B.

Column A Column B

4. Refers to physical characteristics such as color, odor, or shape (B)

a. observation

5. Refers to mass, volume, and temperature measurements (C)

b. qualitative data

6. A variable controlled by the experimenter (D) c. quantitative data 7. The act of gathering information (A) d. independent variable

8. Changes in value based on the value of the controlled

variable (E) e. dependent variable

9. What are three important safety rules?

Choose any rule from the safety contract on page 4 of your ISN.

10. What is the difference between a physical and a chemical property?

A physical property can be observed without changing the substance (ex. color, mass, volume, any phase change) and a chemical property can only be observed by changing the substance (ex. reactivity with water, flammability).

For 11-15, determine if it is a substance or a mixture, and then determine if it is an element, compound, heterogeneous, or homogeneous.

11. Zinc – substance, element

12. Sand and water – mixture, heterogeneous

13. Milk – mixture, homogeneous

14. Eggs – mixture, heterogeneous

15. Aluminum Chloride - substance, compound

16. What are the four indications that a chemical reaction has occurred?

Color change, energy is released or taken in by the substances, precipitate is formed, gas is released and the gas is a new substance.

17. The density of aluminum is 2.70 g/mL. If the mass of a piece of aluminum is 244 grams, what is the volume of the aluminum?

𝑫 =  𝑴𝑽,𝒎𝒖𝒍𝒕𝒊𝒑𝒍𝒆  𝒃𝒐𝒕𝒉  𝒔𝒊𝒅𝒆𝒔  𝒃𝒚  𝑽

𝑽𝑫 = 𝑴,𝒅𝒊𝒗𝒊𝒅𝒆  𝒃𝒐𝒕𝒉  𝒔𝒊𝒅𝒆𝒔  𝒃𝒚  𝑫

𝑽 =  𝑴𝑫

𝑽 =  𝟐𝟒𝟒  𝒈𝒓𝒂𝒎𝒔

𝟐.𝟕𝟎   𝒈𝒎𝑳= 𝟗𝟎.𝟑𝟕  𝒎𝑳

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18. An ice cube measuring 5.80 cm by 5.80 cm by 5.80 cm has a density of 0.917 g/ cm3. What is

the mass?

𝑫 =  𝑴𝑽,𝒎𝒖𝒍𝒕𝒊𝒑𝒍𝒆  𝒃𝒐𝒕𝒉  𝒔𝒊𝒅𝒆𝒔  𝒃𝒚  𝑽

𝑽𝑫 = 𝑴

Before plugging in, need to find the volume of the ice cube.

𝑽 = 𝑳 ∗𝑾 ∗𝑯 = 𝟓.𝟖𝟎  𝒄𝒎 𝟓.𝟖𝟎  𝒄𝒎 𝟓.𝟖𝟎  𝒄𝒎 =  𝟏𝟗𝟓.𝟏𝟏𝟐  𝒄𝒎𝟑

𝑽𝑫 = 𝑴 = 𝟏𝟗𝟓.𝟏𝟏𝟐  𝒄𝒎𝟑 𝟎.𝟗𝟏𝟕  𝒈𝒄𝒎𝟑 =  𝟏𝟕𝟖.𝟗𝟐  𝒈

19. A cup of gold colored metal beads was measured to have a mass 425 grams. By water

displacement, the volume of the beads was calculated to be 48.0 cm3. Given the following densities, identify the metal.

Gold: 19.3 g/mL Copper: 8.86 g/mL Bronze: 9.87 g/mL

𝑫 =  𝑴𝑽=  𝟒𝟐𝟓  𝒈𝒓𝒂𝒎𝒔𝟒𝟖.𝟎  𝒄𝒎𝟑 = 𝟖.𝟖𝟓  𝒄𝒎𝟑

The cup is full of copper because the density is closest to the density of copper.

20. What is the density of a piece of wood that has a mass of 25.0 grams and a volume of 29.4 cm3?

𝑫 =  𝑴𝑽=  𝟐𝟓.𝟎  𝒈𝒓𝒂𝒎𝒔𝟐𝟗.𝟒  𝒄𝒎𝟑 = 𝟎.𝟖𝟓

𝒈𝒄𝒎𝟑

21. What is the conservation of mass?

Mass is neither created nor destroyed during a chemical reaction. Mass in = Mass out.

22. Copper Chloride dissolves in water. What separation technique would you use to separate them?

Copper Chloride is a solid and water is a liquid. Evaporation would be the best technique.

23. You place small beads in water. What two separation techniques could you use to separate them?

Small beads are not soluble in water. The beads are a solid and water is a liquid. Filtration or hand separation would work.

24. What is and when would you use volume by difference?

Volume by difference enables you to determine the volume of an irregular object. Fill a graduated cylinder halfway with water. Write down the volume (V1). Place the object in the graduated cylinder. Write down the volume of the water with the object (V2). The volume of the irregular object is V2 – V1.

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