R 1.1-1.6 Flashcards Preview

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Flashcards in R 1.1-1.6 Deck (19):
1

significant figures

certain digits and first uncertain digit (estimated number), the convention of significant figures automatically indicates something about the uncertainty in a measurement, uncertainty in the last number usually assumed to be + over - unless indicated

2

rules for counting significant figures

1. non zeros integers 2. zeros 3. exact numbers

3

non zero integers

always count as significant figures

4

temperatures

three systems: Celsius, kelvin, Fahrenheit

5

celcisu

physical scienes

6

kelvin

physical scienies

7

fahreneheit

engineering sciens

8

celcisu and kelvin

different is zero points, same: size of temperature unit (the degree)

9

conversion between Celsius and kelvin

k = c + 273.15
c = k - 273.15
when converting: consider two adjustments (one for degree, one for zero), account for difference in degree size

10

density

property of matter that is often used by chemists as an identification tag, mass of substance divided by volume, can be determined easily by weighing an accurately known volume of liquid, identification of substances, used to determine amount of anti-freeze

11

deci

10 to the -1

12

exa

10 to the 18

13

peta

10 to the 15

13

heco

10 the 3

15

atto

10 to the -18

16

pico

10 to the -12

17

deka

10 to the 1

18

femto

10 to the -15

19

tera

10 to the 12