Module 1

Question 1

How to calculate volume

Answer 1

L x W x H

Question 2

Sig figs
3.400 —->
0.0087 ——>
2400—->

Answer 2

1. 4 sf
2. 2 sf
3. 2 sf

Question 3

Definition of accuracy

Answer 3

The degree between the true value in the measured value

Question 4

The definition of precision

Answer 4

A measure of the agreements of replicated measurements

Question 5

Kilograms to milligrams

Answer 5

1 kg= 10^3 g
1 g= 10^3 mg

Question 6

Conversion factor between Fahrenheit and Celsius

Answer 6

TF: 1.8x T° C +32

TC: T°F -32
————
1.8

Question 7

Converting to kelvin

Answer 7

T°C + 273.15

Question 8

Density

Answer 8

D= m/ v

Question 9

What does the mass number of an element mean?

Answer 9

Proton and neutron

Question 10

What does the atomic number represent?

Answer 10

The number of protons

Question 11

What are isotopes?

Answer 11

Adam saw the same element with different masses

Question 12

Calculating atomic mass of isotopes

Answer 12

Convert the percentage to a fraction (divide by 100).
Then multiply by the atomic mass (amu)
Then add both amu together

Question 13

Classification of metals and nonmetals

Answer 13

Metals: Elements that tend to lose electrons
Nonmetals: elements that gain electrons

Question 14

Sublevels
S, P, D, F

Answer 14

S: 2
P: 6
D: 10
F: 14

Question 15

Cations and anions

Answer 15

Cations are metals that form positive charges
Anions are nonmetals that form negative charges

Question 16

The size of atoms on the periodic table

Answer 16

The size decreases by going across
The size increases by going down the table

Question 17

The size of relative energy in ions of atoms

Answer 17

The size increases going down
The size increases by going across the table

Question 18

Definition of ionic bond

Answer 18

Transfer of electrons between the metal and a nonmetal

Question 19

Covalent bond

Answer 19

Sharing of electrons between two metals

Question 20

Naming ionic compounds

Answer 20

Na2o= sodium oxide
Li2O= lithium oxide
FeCl2= iron (II) chloride

Question 21

Polyatomic, cations and anions

Answer 21

BaSO4= barium sulfate
CuHCO3= Copper I bicarbonate

Question 22

Naming covalent compound

Answer 22

SiO2- silicon dioxide
CCl4= carbon tetra chloride

Question 23

Non-electrolytes

Answer 23

Covalent solids that don’t associate and don’t conduct electricity

Question 24

Lewis structures

Answer 24

H2O: H—O—H
N2: :N (triple bond) N:

Question 25

Geometric shaping of electron pairs

Answer 25

2 atoms, 0 lone pairs, 180°, linear Three, 0 lone pairs, 120, trigonal planar -2 atoms, 1 loan pair,< 120° degrees, bent -4 atoms, 0 law pairs, 109.5°, tetrahedral -3 atoms, 1 lone pair,~ 107°, trigonal pyramidal -Adams, two pairs,~ 104.5°, bent

Question 26

Mass to amu

Answer 26

1 amu= 1.661 x10^-24g

Question 27

Converting of massive atoms

Answer 27

_ amu • 1.661 x10^-23g / 1 amu= _ g

Question 28

Avocado’s number

Answer 28

1 mole= 6.022×10^23 atoms

Question 29

Atoms to moles

Answer 29

_ atoms • 1mol / avagad. # =_ moles

Question 30

Grams to sulfur

Answer 30

Grams to moles/ mol.mass to atoms/ A#

Question 31

Four types of chemical reactions

Answer 31

1. Combination. 2. Decomposition. 3. Single replacement. 4. Double replacement.

Question 32

Combination reaction

Answer 32

A+ B-> AB

Question 33

Decomposition reaction

Answer 33

AB-> A + B

Question 34

Single replacement reaction

Answer 34

A+ BC -> B + AC

Question 35

Double replacement reactions

Answer 35

AB + CD -> AD + CB

Question 36

Moles to mole conversion factor

Answer 36

_ moles • moles/ moles = _ moles

Question 37

Moles to grams

Answer 37

Moles • _ g/ moles Look at coefficients in equation

Question 38

Theoretical yield

Answer 38

Finding the lesser number from two different conversion factors (in grams)

Question 39

Percent yield

Answer 39

Actual yield —————- • 100. = Theoretical yield

Question 40

Percent yield

Answer 40

Actual yield —————- • 100. = Theoretical yield