Chemistry-Chapter 2-Notes 1 Flashcards Preview

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Flashcards in Chemistry-Chapter 2-Notes 1 Deck (51):
1

What mixture will allow paper to give off flames but not burn?

water and rubbing alcohol

2

Real life values: meter

golf club

3

Real life values: decimeter

diameter of an orange

4

Real life values: centimeter

width of pinky finger

5

Real life values: millimeter

width of dime

6

What are the only truly exact numbers?

Whole things, such as people, which do not come in units less than one

7

Real life values: meter cubed

washing machine

8

Real life values: centimeter cubed

sugar cube

9

How many millimeters cubed are in a meter cubed?

1,000,000,000
one billion

10

Real life values: Liter

half a large soda bottle

11

1 Liter = ? milliliters

1000

12

1 Liter = ?
(hint, think meters)

1 decameter cubed

13

1 milliliter = ?
(hint, think meters)

1 centimeter cubed (or cc)

14

How many drops of water fit in a mL?

about 20

15

Real life values: Room temperature in Celcius

23 degrees

16

Real life values: Body temperature in Celsius

37 degrees

17

Real life values: Hot in Celsius

30 degrees

18

Real life values: Very Cold in Celsius

-20 degrees

19

Real life values: comfortable in Celsius

20 degrees

20

Real life values: Cold in Celsius

-10 degrees

21

Reel life values: Chilly/Cool in Celcius

10 degrees

22

Real life values: gram

large paper clip

23

How much does a penny weigh in grams?

2.5 g

24

Who much does an iPhone 5 weigh in grams?

115 g

25

What is the density of water?

1.00 g/mL (at room temperature)

26

What is water displacement?

A method by which the volume of irregularly shaped objects can be determined
An object (denser than water) is placed into a recorded amount of water. The increase in volume of the water once the object is added is the volume of said object.

27

Name all of the steps of the Scientific Method:

Observations (qualitative and quantitative); Hypothesis; Experiment; Analysis; Conclusion (return to Hypothesis if original was incorrect)

28

system

a specific portion of matter in a given region of space that has been selected for study during an experiment or observation

29

variables

the portion of the experiment that is changed; only one variable should be in each experiment

30

control

the portion of the experiment tjat is held constant throughout the experiment to ensure that you are only testing the variable

31

hypothesis

an educated guess or testable question

32

model

more than a physical object
explanation of how phenomena occur and how data or events are related
if it successfully explains many phenomena, it may become part of a theory or law

33

theory

broad generalization that explains a body of facts or phenomena

34

Are zeroes between nonzero digits significant?

Yes

35

Are zeroes appearing in front of all nonzero digits significant?

No

36

Are zeroes at the end of a number but to the right of a decimal point significant?

Yes

37

Are zeroes at the end of a number but to the left of a decimal point significant?

If the zeroes are measured and not just placeholders or there is a decimal at the end of the number, Yes
If the zeroes are placeholders and there is not a decimal point after them, No

38

digit or figure

0, 1, 2, 3, 4, 5, 6, 7, 8, 9

39

significant digit or figure

digit that helps you to undertand the details of the entire number given to you

40

Scientific Notation

M x 10^n
M is a number greater than or equal to 1 but less than 10
n is a whole number (potentially negative)

41

Sig Fig Rule for Adding and Subtracting:

limit and round answers to the least number of decimal places in any of the numbers used to make up your answer

42

Sig Fig Rule for Multiplying and Dividing

limit and round answers to have as many total sig figs as the factor with the least number of sig figs

43

How many decimal places do you take precise measurements to?

One decimal place past the smallest marking on the means of measurement

44

Where do you take a measurement of volume on a liquid with a meniscus?

at the lowest point in the curve of the meniscus

45

Where can the uncertain digit in any number WITH A DECIMAL POINT be found?

it is the last sig fig

46

Where can the uncertain digit(s) be found in a number WITHOUT A DECIMAL POINT?

last sig fig and any zeroes after that

47

What is the formula for Percent Error?

Percentage Error= ((Value Experimental - Value Accepted) / Value Accepted) x 100%

48

Qualitative

related to qualities of matter which do not change based on amount

49

Quantitative

related to the amount of matter

50

Density Formulas

D=M/V
M=DV
V=M/D

51

What is the difference between mass and weight?

Mass does not change with gravity
Weight is based on gravity