Test: Pure substances and Mixtures (pure substance - elements - mixtures


Pure substances and MixturesVersion en ligne In this section students will be able to identify the characteristics of pure substances and the differences between mixtures. par Alejandra Henriquez 1 Anything that has mass and takes up space a weight b molecule c matter d volume 2 Every sample of a pure substance is either an element, a compound, or a a atom b molecule c element d mixture 3 Type of pure substance that cannot be separated into simpler substance by physical means a element b compound c molecule d atom 4 The smallest unit of an element that keeps the element's chemical properties is a(n) a molecule b element c compound d atom 5 Each_________ of a compound contains two or more elements that are chemically combined a atom b molecule c element d compound 6 A sample of matter, either a single element or a single compound that has a definite chemical and physical property is classified as a molecule b element c pure substance d mixture 7 Combination of two or more substances that are not chemically combined a mixture b pure substance c diatomic molecule d compound 8 Which of the following is a mxture? a air b salt c water d sulfur 9 If you add oil to water and shake the liquid you will form a a pure substance b miscible liquid c heterogenous mixture d homogenous mixture 10 The label on a bottle states "Shake well before using it". The medicine is probably a a solution b suspension c colloid d gel 11 Which of the following is a solid dissolved in a solid a smoke b bronze c mayonnaise d ice 12 In a solution, the substance in which the solute dissolves Written answer 13 Example of liquid solution that contains no water Written answer 14 The process of pouring a less dense liquid off a denser liquid is called Written answer 15 Classify the following as homogenous or heterogenous mixtures a. orange juice with pulp b. sweat c. cinnamon sugar d. concrete Written answer 16 Classify the following as element or compound a. sulfur b. carbon dioxide c. alcohol d. iron Written answer 17 23000 mg of lead are mixed with 500 grams of water. Find the percentage of lead in this solution. Written answer 18 List 5 different ways to separate mixtures and give a brief description of each Written answer 19 Watch the following video. At the end of this process, can we say that water has been separated from other substances just by physical means or chemical means heve been used as well?. Explain Written answer 20 Explain why an alloy is a type of solution. Why are alloys sometimes used instead of pure metals? Written answer Feedback 3 Matter can be separated, but not all matter canbe separated physically 8 mixtures can be calssified as homogenous and heterogenous 12 please check the spelling 13 check your spelling 18 please check the spelling 20 please check the spelling

1

Anything that has mass and takes up space

a

weight

b

molecule

c

matter

d

volume

2

Every sample of a pure substance is either an element, a compound, or a

a

atom

b

molecule

c

element

d

mixture

3

Type of pure substance that cannot be separated into simpler substance by physical means

a

element

b

compound

c

molecule

d

atom

4

The smallest unit of an element that keeps the element's chemical properties is a(n)

a

molecule

b

element

c

compound

d

atom

5

Each_________ of a compound contains two or more elements that are chemically combined

a

atom

b

molecule

c

element

d

compound

6

A sample of matter, either a single element or a single compound that has a definite chemical and physical property is classified as

a

molecule

b

element

c

pure substance

d

mixture

7

Combination of two or more substances that are not chemically combined

a

mixture

b

pure substance

c

diatomic molecule

d

compound

8

Which of the following is a mxture?

a

air

b

salt

c

water

d

sulfur

9

If you add oil to water and shake the liquid you will form a

a

pure substance

b

miscible liquid

c

heterogenous mixture

d

homogenous mixture

10

The label on a bottle states "Shake well before using it". The medicine is probably a

a

solution

b

suspension

c

colloid

d

gel

11

Which of the following is a solid dissolved in a solid

a

smoke

b

bronze

c

mayonnaise

d

ice

12

In a solution, the substance in which the solute dissolves

Written answer

13

Example of liquid solution that contains no water

Written answer

14

The process of pouring a less dense liquid off a denser liquid is called

Written answer

15

Classify the following as homogenous or heterogenous mixtures a. orange juice with pulp b. sweat c. cinnamon sugar d. concrete

Written answer

16

Classify the following as element or compound a. sulfur b. carbon dioxide c. alcohol d. iron

Written answer

17

23000 mg of lead are mixed with 500 grams of water. Find the percentage of lead in this solution.

Written answer

18

List 5 different ways to separate mixtures and give a brief description of each

Written answer

19

Watch the following video. At the end of this process, can we say that water has been separated from other substances just by physical means or chemical means heve been used as well?. Explain

Written answer

20

Explain why an alloy is a type of solution. Why are alloys sometimes used instead of pure metals?

Written answer

Feedback

3

Matter can be separated, but not all matter canbe separated physically

8

mixtures can be calssified as homogenous and heterogenous

12

please check the spelling

13

check your spelling

18

please check the spelling

20

please check the spelling

Pure substances and Mixtures

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