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Problem 1.11. Do the following statements describe chemical or physical properties? Oxygen gas supports combustion Fertilizers help to increase agricultural production Water boils below 100°C on top of a mountain Lead is denser than aluminum Sugar tastes sweet. Chemical. Chemical.

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Problem 1 11 l.jpg
Problem 1.11

Do the following statements describe chemical or physical properties?

  • Oxygen gas supports combustion

  • Fertilizers help to increase agricultural production

  • Water boils below 100°C on top of a mountain

  • Lead is denser than aluminum

  • Sugar tastes sweet

Chemical

Chemical

Physical

Physical

Chemical


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Problem 1.12

Does each of the following describe a physical change or a chemical change?

  • The helium gas inside a balloon tends to leak out after a few hours

  • A flashlight beam slowly gets dimmer and finally goes out

  • Frozen orange juice is reconstituted by adding water to it

  • The growth of plants depends on the sun’s energy in a process called photosynthesis

  • A spoonful of table salt dissolves in a bowl of soup

Physical

Chemical

Physical

Chemical

Physical


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Li


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3

lithium

6.941

Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Li


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

F


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

9

F

fluorine

19.00


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

P


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

15

P

phosphorus

30.97


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Cu


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29

copper

63.55

Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Cu


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

As


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

33

As

arsenic

74.92


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Zn


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

30

Zn

zinc

65.39


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Cl


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

17

Cl

chlorine

35.45


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Pt


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

78

Pt

platinum

195.1


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Mg


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

12

Mg

magnesium

24.31


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

U


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

92

U

uranium

238.0


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Al


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

13

Al

aluminum

26.98


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Si


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

14

Si

silicon

28.09


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

Ne


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Problem 1.13

  • Give the names of the elements represented by the chemical symbols:

10

Ne

neon

20.18


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Problem 1.14

Give the chemical symbols for the following elements:

  • potassium

  • tin

  • chromium

  • boron

  • barium

  • plutonium

  • sulfur

  • argon

  • mercury

K

Sn

Cr

B

Ba

Pu

S

Ar

Hg


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Problem 1.15

Classify each of the following substances as an element or a compound:

  • hydrogen

  • water

  • gold

  • sugar


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Problem 1.15

Classify each of the following substances as an element or a compound:

  • hydrogen

  • water

  • gold

  • sugar

elements in yellow


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Problem 1.16

Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

  • seawater

  • helium gas

  • sodium chloride

  • a bottle of soft drink

  • a milkshake

  • air in a bottle

  • concrete

homogeneous mixture

element

compound

homogeneous mixture

heterogeneous mixture

homogeneous mixture

heterogeneous mixture


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