Introduction and measurments Flashcards

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1
Q

Matter

A

Anything that has mass and occupies space

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2
Q

What is Chemistry

A

the study of the composition of matter and the changes it undergoes

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3
Q

How many areas of study are there

A

5

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4
Q

Organic chemistry

A

The study of chemicals that contain carbon

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5
Q

Inorganic chemistry

A

The study of chemicals that do not contain carbon

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6
Q

Biochemistry

A

The study of living things and the processes that take place within them

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7
Q

Analytical Chemistry

A

the study of the composition of matter

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8
Q

physical chemistry

A

the study of the mechanism, rate and the energy transfer that occurs when matter undergoes a change

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9
Q

how many SI base units are there

A

7

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10
Q

base unit of length

A

meter

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11
Q

Space taken up by a cube that is 10cm on each side

A

one liter

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12
Q

what is weight

A

measure of the pull of gravity on an object of given mass

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13
Q

the mass of one cubic centimeter of water at 4 degrees celcius is

A

one gram

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14
Q

density

A

ration of mass of an object to its volume

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15
Q

What does density depend on

A

composition of a substance

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16
Q

what does kilo mean

A

1000 times larger

17
Q

what does pico mean

A

1 trillion times smaller

18
Q

what does micro mean

A

1 million times smaller

19
Q

what does centi mean

A

100 times smaller

20
Q

what does milli mean

A

1000 times smaller

21
Q

what does nano mean

A

1 billion times smaller

22
Q

what does deka mean

A

10 timeslarger

23
Q

what does mega mean

A

1 million times larger

24
Q

what does hecto mean

A

100 times larger

25
Q

what does deci mean

A

10 times smaller

26
Q

What is the first rule of significant figures

A

All non zero digits in a measured number are significant

27
Q

what is the second rule of significant figures

A

leading zeros in a decimal number are not significant
example:.008 has one significant figure

28
Q

what is the third rule of significant figures

A

zeros between non zero numbers are significant
example: 50.8 has 3 significant figures

29
Q

what is the fourth rule of significant figures

A

trailing zeros in a number without decimals are not significant
example: 25,000 has two significant figures (2 and 5)