Chem 104 (Chapter 1-4)

Question 1

Mega(M)

Answer 1

10^6

Question 2

Kilo(k)

Answer 2

10^3

Question 3

Deci(d)

Answer 3

10^-1

Question 4

Centi(c)

Answer 4

10^-2

Question 5

Milli(m)

Answer 5

10^-3

Question 6

Micro(u)

Answer 6

10^-6

Question 7

Length

Answer 7

Meters(m)

Question 8

Time

Answer 8

Seconds(s)

Question 9

Temperature

Answer 9

Degree Celsius(•C)

Question 10

Volume

Answer 10

Liters(L)

Question 11

Mass

Answer 11

Grams(g)

Question 12

In exact number

Answer 12

Measurement or observation (has sig figs)

Question 13

Exact number

Answer 13

Counting / part of definition(infinite sig figs)

Question 14

Non zero digit (1-9)

Answer 14

Are significant

Question 15

In between zeros (2.06)

Answer 15

In between two digits that are not zero

Question 16

Trailing zeros (141.00)

Answer 16

Only significant if a decimal point is written

Question 17

Before zeros (0.0013)

Answer 17

Not significant

Question 18

Addition/ Subtraction problems

Answer 18

Never count the number of sig figs till the end, pick the furthest left sig fig

Question 19

Multiplication / Division problems

Answer 19

Use the digit with the lowest sig fig for final number of sig figs

Question 20

1ft

Answer 20

12in

Question 21

Density formula

Answer 21

d = m/v

Question 22

dH2O =

Answer 22

1.00g/mL

Question 23

dAu =

Answer 23

19.3g/mL

Question 24

dpt =

Answer 24

21.45g/mL

Question 25

Specific Gravity formula

Answer 25

Density of substance/Density of water

Question 26

States of matter

Answer 26

Solid(s), Liquid(l), Gas(g)

Question 27

Physical state of solids

Answer 27

No freedom of motion Don’t take shape of its container Packed close together Not compressible

Question 28

Physical state of liquids

Answer 28

Little freedom of motion Takes shape of its container Packed close together Not compressible

Question 29

Physical state of gases

Answer 29

Move freely Take shape of the container Not packed close together Compressible

Question 30

Pure substances (one component) (Ex: glass of water)

Answer 30

Element(one kind of atom)(Ex: He) Compound(more than one kind of atom)(Ex: H2O)

Question 31

Mixtures

Answer 31

2 or more components( Ex: coffee)

Question 32

Sub categories of mixtures

Answer 32

Homogenous(uniform throughout)(Ex: coffee) Heterogeneous(not uniform throughout)(Ex: sand and water)

Question 33

Molecule

Answer 33

More than one atom

Question 34

Kelvin to Celsius

Answer 34

K = •C + 273

Question 35

Celsius to Fahrenheit

Answer 35

•C = (•F - 32)/1.8

Question 36

Energy

Answer 36

The capacity to do work

Question 37

Kinetic energy

Answer 37

Associated with motion

Question 38

Potential energy

Answer 38

Associate with relative location

Question 39

Laws of conservation of energy

Answer 39

Energy cannot be created not destroyed

Question 40

Energy units

Answer 40

Joule(J) calories(cal) Calories(Cal) - dietary

Question 41

Conversion of energy units

Answer 41

1cal = 4.184 J 1Cal = 1000cal 1Cal = 1Kal

Question 42

Dietary c

Answer 42

Protein: 4 Cal = 1g Carbohydrates: 4 Cal = 1g Fats: 9 Cal = 1g

Question 43

Change in temperature formula

Answer 43

q = mSH(triangle)T

Question 44

Change in temperature

Answer 44

m = mass SH = specific heat capacity (cal/g*•C) (Triangle)T = change in temp (Tf - Ti)

Question 45

Specific heat capacity of water

Answer 45

H2O(s): 0.485 (cal/g*•C) H2O(l): 1.00 (cal/g*•C) H2O(g): 0.481 ( cal/g*•C)

Question 46

Heat, phase change

Answer 46

H2O(s) - H2O(l) = melting(+) (Triangle)H fusion = 80. cal/g (Triangle) H: Endothermic - requires/ absorbs energy

Question 47

H2O(l) - H2O(s) = freezing (-)

Answer 47

(Triangle) H = (-)80. cal/g Exothermic reaction: releases: lose of energy

Question 48

At 100•C: H2O(l) - H2O(g)= vaporization H2O(g) - H2O(l) = condensation

Answer 48

(Triangle) H vaporization = 540. cal/g (Triangle) H condensation = (-) 540. cal/g