Lecture 1

Question 1

Celsius to Fahrenheit

Answer 1

F=1.8C+32

Question 2

Celsius to Kelvin

Answer 2

K=C+273

Question 3

2^-1

Answer 3

2^-1=1/(2^-1)=1/2

Question 4

g/cm^3

Answer 4

g/cm^3=g • cm^-3

Question 5

10^3 • 10^-4

Answer 5

When powers are multiplied, the exponents are added.

10^3 • 10^-4 = 10^-1

Question 6

cm^3/cm

Answer 6

When powers are divided, the exponents are subtracted

cm^3/cm= cm^2

Question 7

Express in scientific notation

11,000,000

Answer 7

1.1 x 10^7

Question 8

Express in scientific notation

0.0000000045

Answer 8

4.5 x 10^-9

Question 9

Express in a regular number

1.02 x 10^-3

Answer 9

0.00102

Question 10

Express in a regular number

4.26 x 10^4

Answer 10

42600

Question 11

Express in a regular number

6.02 x 10^23

Answer 11

602000000000000000000000

Question 12

(4.8 x 10^-6)/(1.2 x 10^3)(2.0 x 10^-8)

Answer 12

2.0 x 10^ -1 or 0.2

Question 13

Water boils

Answer 13

212F or 100C

Question 14

Water freezes

Answer 14

32F or 0C

Question 15

Charles Law

Answer 15

V/T=k

Volume or gas is directly proportional to the temperature (when pressure is constant

Question 16

Boyles law

Answer 16

Volume and pressure are inversely proportional when temperature is constant
PV=k

Question 17

Physical properties

Answer 17

A physical property can be observed or measured without changing the chemical make up of a substance

A physical change occurs without producing a new chemical substance

Question 18

Precision

Answer 18

The consistency and reproducibility of a test (reliability)

Increased precision = decreased standard deviation

Question 19

Accuracy

Answer 19

The trueness of test measurements (validity)

Question 20

Improving accuracy

Answer 20

Improved by making replicate measurements and taking the average

Question 21

Percent error

Answer 21

Accuracy is assessed by calculating the percent error

%error=( (measured value-“true” value)/(“true” value) )x 100%

Question 22

Improving precision?

Answer 22

Improved by careful lab technique and or using instruments with more significant figures. More significant figures imply greater precision

Question 23

Standard deviation

Answer 23

Precision is quantified by standard deviation

Standard deviation= £(measurements-average of measurement)^2/(number of measurements - 1)

Question 24

Length

Answer 24

Meter (m)

Question 25

Mass

Answer 25

Gram (g)

Question 26

Temperature

Answer 26

Kelvin (K)

Question 27

Amount of material

Answer 27

Mole (mol)

Question 28

Volume

Answer 28

Liter (L)

Question 29

Liter

Answer 29

1000cc

Question 30

Tetra

Answer 30

T | 10^12

Question 31

Giga

Answer 31

G | 10^9

Question 32

Mega

Answer 32

M | 10^6

Question 33

Kilo

Answer 33

k | 10^3

Question 34

Hecto

Answer 34

h | 10^2

Question 35

Deca

Answer 35

da | 10^1

Question 36

Deci

Answer 36

d | 10^-1

Question 37

Centi

Answer 37

c | 10^-2

Question 38

Milli

Answer 38

m | 10^-3

Question 39

Micro

Answer 39

u with a tail | 10^-6

Question 40

Nano

Answer 40

n with long tail | 10^-9

Question 41

Pico

Answer 41

p | 10^-12

Question 42

Coldest possible temperature

Answer 42

Absolute zero Kelvin scale begins at absolute zero 0K=absolute zero=-273.15C Kelvin is the same degree as 1 degree C

Question 43

1 inch

Answer 43

2.54 cm

Question 44

1 cm

Answer 44

0.4 inches

Question 45

1 kg

Answer 45

2.2046 lbs

Question 46

1 lb

Answer 46

0.454 kg

Question 47

1 mile to km

Answer 47

1.609 km

Question 48

1 mile to ft

Answer 48

5280 ft

Question 49

1 pound to ounces

Answer 49

16 ounces

Question 50

1 ounce to grams

Answer 50

28.35 g

Question 51

1 grain to mg

Answer 51

64.80 mg

Question 52

1 L to dm^3 (decimeter)

Answer 52

1 dm^3

Question 53

1 gal into liters

Answer 53

3.79 L

Question 54

1 ml to cm^3

Answer 54

1 cm^3

Question 55

1 cc to cm^3

Answer 55

1 cm^3

Question 56

Density

Answer 56

D=m/v Most common is g/mL Density of water is 1.0g/mL Density of mercury is 13.6g/mL

Question 57

Bone density test to diagnose?

Answer 57

Osteoporosis

Question 58

Specific gravity

Answer 58

Specific gravity = density of object/density of water | Ratio of objects density to density of water

Question 59

Specific gravity of urine

Answer 59

1.005 to 1.030

Question 60

Low specific gravity

Answer 60

Hyposthenuria: indicates dilute urine, which may be caused by - diabetes insipidus (can be as low as 1.001) - drinking excessive amounts of liquid - pyelonephritis, glomerulonrphritis - diuretics

Question 61

High specific gravity

Answer 61

Hypersthenuria: indicates very concentrated urine, which may be caused by 1. Dehydration 2. Diabetes Mellitus 3. Adrenal Insufficiency 4. Toximea if pregnancy (protein in the urine)