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Chemistry Flashcards

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1
Q

What is a Matter

A

A substance which occupies space

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2
Q

What is a Element

A

A pure substance which cannot be decomposed into substances by a chemical reaction

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3
Q

What are the Categories of Elements

A

(1) Metals and (2) Non-metals

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4
Q

What is a Compound

A

A pure substance composed of two or more elements combined in definite proportions

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5
Q

What is a Density

A

The ratio of an object’s mass by volume

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6
Q

What is the conversion from Celsius to Kelvin

A

273.15

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7
Q

What is the conversion from Celsius to Fahrenheit

A

Thrity two plus one and two fifths of the Celsius degree

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8
Q

What is the Celsius freezing point of water

A

0° C

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9
Q

What is the Fahrenheit freezing point of water

A

32° F

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10
Q

What is the Kelvin freezing point of water

A

273.15 K

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11
Q

What is a Mixture

A

A matter consistence of two or more pure substances

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12
Q

What is a Pure Substance

A

A matter with the same composition which cannot be separated by physical reaction

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13
Q

What are the Types of Pure Substances

A

(1) Elements and (2) Compounds

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14
Q

What are the Types of Mixture

A

(1) Homogeneous and (2) Heterogeneous

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15
Q

What is a Solution

A

A homogeneous mixture

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16
Q

What is a Homogeneous Mixture

A

A mixture with a uniformity composition

17
Q

What is a Heterogeneous Mixture

A

A mixture without a uniformity composition

18
Q

What is a Atom

A

The smallest unit of a pure substance

19
Q

What are the Catagories of Physical States

A

(1) Solid (2) Liquid and (3) Gas

20
Q

What is a Physical Property

A

A characteristic which can be observed or measured without changing the composition of a substance

21
Q

What are Examples of Physical Property

A

(1) Color (2) Odor (3) Physical State (4) Mass (5) Volume (6) Density (7) Temperature

22
Q

What is a Molecule

A

The discrete arrangement of two or more atoms bounded

23
Q

How are Pure Substances commonly represented

A

(1) Element Symbols and (2) Chemical Formulas

24
Q

What are the Classifions of Substance Change

A

(1) Physical and (2) Chemical

25
Q

What remains unchanged in a Physical Change

A

The identity of the substance

26
Q

What are the Determinations of Chemical Properties

A

(1) Compositions and (2) Chemical Changes

27
Q

What is an Object’s Energy

A

A combination of kinetic and potential energy

28
Q

What is a Energy

A

The capacity to do work or to transfer heat

29
Q

What are included in Scientific Methods

A

(1) Theories (2) Observations (3) Hypotheses and (4) Laws

30
Q

What is a Hypotheses

A

A tentative explanation for the results of experiments

31
Q

When are Laws resulted

A

When observations appear to have universal validity

32
Q

What is a Theory

A

A supposition explanation of a law

33
Q

What is a Chemical Change

A

The rearrangement of atoms which form new substances

34
Q

What is involved in substance changes

A

Energy

35
Q

What changes form and transfers heat

A

Energy

36
Q

What is a Observation

A

A scientific method designed for carefully controlled experiments

37
Q

What is Data Collection

A

An observation

38
Q

What is a Scientific Method

A
39
Q

What is a Chemical Reaction

A

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