Question

327 chemistry prep ii
unit 1 ch 3 test
name: anisine collins
read and initial the academic integrity code for this course:
i affirm that i have not given or received any unauthorized assistance on this test. ac (initials)
student response: read each section/question carefully. formulate a response and place your answer directly on this paper in the space(s) provided. (point values are noted.)

1. your choice. select one of the following substances. circle your choice. (1 pt)

salt water dirt copper (cu) salt (nacl)
circle which of the follow best identifies your selected substance above. (1 pt)
element compound homogeneous mixture heterogeneous mixture
name at least one specific physical property of your selected substance, ____________ (2 pts)
circle whether the property you listed is intensive or extensive. (1 pt)
name at least one possible chemical property of your selected substance, ____________ (2 pts)

1. understanding states of matter. complete the following chart by filling in the missing information. write the word. (1 pt each)

physical state	definite shape (yes or no?)	definite volume (yes or no?)	easily compressed (yes or no?)
gas
solid

1. understanding types of matter. complete the following chart by identifying if the substance is an element, compound or mixture. write the word. (1 pt each)

substance	element, compound or homogeneous mixture or heterogeneous mixture
trail mix
carbon dioxide (co2)
iced tea

1. separating substances. you have a jar containing water, sand, rocks, and dissolved salt. which item would be easiest to separate first? why? how? be sure to answer all three questions. write in complete sentences. explain your answer thoroughly. (4 pts)

1 rocks
complete the chart using examples from the scenario. if no example is found draw an \x\: a student is working the lab with a piece of shiny silver metal that weighs 7.80 grams. the student hammers the metal into a thin sheet and then melts the metal to pour it into a mold to make a mini metal cardinal statue. (1 pt each)

identify 1 physical change?	identify 1 intensive property?

Explanation:

Step1: Answer question 1 (assuming copper is selected)

Copper (Cu) is an element. A physical property could be its color (shiny reddish - brown). Color is an intensive property. A chemical property could be its ability to react with oxygen to form copper oxide.

Step2: Answer question 2

Physical State	Definite shape (Yes or No?)	Definite volume (Yes or No?)	Easily compressed (Yes or No?)
Gas	No	No	Yes
Solid	Yes	Yes	No

Step3: Answer question 3

Substance	Element, compound or homogeneous mixture or heterogeneous mixture
Trail Mix	Heterogeneous mixture
Carbon dioxide (CO₂)	Compound
Iced Tea	Homogeneous mixture

Step4: Answer question 4

The rocks would be easiest to separate first. Why: They are the largest - sized particles and can be seen easily. How: They can be separated by simple filtration or by picking them out with tweezers or hands if the jar is accessible.

Step5: Answer the last part

Identify 1 Physical change	Identify 1 Intensive property
Identify 1 Chemical Change	Identify 1 extensive property
X	Mass (7.80 grams)

Answer:

1. If copper (Cu) is selected: Element; Color (intensive); Ability to react with oxygen (chemical property)
2. See the filled - in table above for states of matter properties.
3. See the filled - in table above for types of matter.
4. The rocks would be easiest to separate first because they are the largest - sized particles and can be seen easily. They can be separated by simple filtration or by picking them out with tweezers or hands.
5. Physical change: Hammering the metal into a thin sheet; Intensive property: Density; Chemical change: X; Extensive property: Mass (7.80 grams)