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Chemistry Today > Chapter 1 > Flashcards

Chapter 1 Flashcards

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1
Q

Chemistry

A

Knowledge that deals with the behavior of matter.

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2
Q

Matter

A

Study that makes up things and has mass.

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3
Q

Mass

A

Measures how much matter is in an object

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4
Q

Weight

A

Measures the force of gravity on an object.

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5
Q

Physical Change

A

An alteration of appearance without a chemical change.

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6
Q

Chemical Change

A

A change in its chemical identity.

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7
Q

Solid

A

Maintains its shape and volume.

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8
Q

Liquid

A

Definite Volume, not definite shape.

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9
Q

Gas

A

no definite volume or shape

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10
Q

Substance

A

Pure matter. It has a definite composition that does not vary form one substance to another. EX: gold

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11
Q

Mixture

A

2 or more substances that mix together, but not chemically.

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12
Q

Homogeneous

A

Has the same composition and appearance. EX: salt and water

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13
Q

Heterogeneous

A

The appearance does not stay the same. EX: sand and water

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14
Q

Element

A

Cannot be broken down into something more simple.

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15
Q

Atom

A

The smallest part of an element

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16
Q

Compound

A

2 or more elements that are chemically combined. They have a fixed ratio.

17
Q

What is the difference between mass and weight?

A

Mass is the measure of how much matter is in a substance. Weight is the amount of gravitational force on an object.

18
Q

What are some properties of matter?

A

Their substance, mixture, elements, solid, liquid, gas, etc.

19
Q

What are some measurements of matter?

A 
KILO-- 10^3
CENTI-- 10^-2
MILI-- 10^ -3
MICRO-- 10^ -4
NANO-- 10^ -5
20
Q

What is Density?

A

It is mass/volume

21
Q

What is energy?

A

The ability to change matter either physically or chemically.

22
Q

How do you convert Celsius to Kelvin?

A

K= C+ 273.15

EX: Body temperature is 37 degrees C. What is it in Kelvin?
K= 37+ 273.15
K= 310.

23
Q

How do you measure heat?

A

Heat is measured in calories or joules.

1 calorie= 4.184J

24
Q

Alchemy

A

The primitive form chemistry.

25
Q

Green chemistry

A

Materials and processes that prevent or reduce pollution

26
Q

Risk – benefit analysis

A

DQ= benefits/risks

27
Q

Applied research

A

Research that is oriented toward a solution of a particular problem

28
Q

Basic research

A

The search for knowledge for it’s own sake

29
Q

What does SI stand for

A

The international system of units

Chemistry Today (17 decks)

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