Lecture 2 - Stoichiometry Part 1

P=E kasi magiging neutral edi walamg charge

Ions (cation and anion) na kapag may charge

Protons, Neutrons, Electrons

S= 32

Al= 26

O= 16

The molar mass of Al3SO4 is 177.007 g/mol.

Al₃SO₄ mass number

Na+

which is more stable:

Na

Na+

Ex:

Na⁺³

Protons =11

Electrons = 8

Ions

“ide”

Anion

Baliktad 31 at 15

Da=dalton

U= unit

Mass and Mole

Molecular mass vs Formula mass

6.02 × 10 ²³

mole

A. Element and molecule

B. Element and molecule

C. Compound and molecule

D. Compound and molecule

E. Element and molecule

not all molecules are compounds (Actual Question)

Element vs Compound vs Molecule

Memorize Periodic Table Mass, Charge (May Check)

1A = “HaLiNa Kay Rubi Cs Friday”

2A = “Beh Magdusa Ca Senora BarbaRa”

3A/ icosagens = “Beh Always Gala In Timeline”

Period 2 =B C N O F Nc

Period 3 = “Si Pascual ay Aries”

Period 4 = “Soen Bra ni Kristine”

Groups and Periods in Periodic Table for charge

g is walang kwento, lagi dpat convert sa moles

Mass → Molar Mass → Moles

Mass → Molar Mass → Moles → Atoms

Molar Mass:

Cu

S

C

Zn