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