Escuela

Alt Codes for typing Spanish characters:

Capitals
Á ALT + 0193
É ALT + 0201
Í ALT + 0205
Ó ALT + 0211
Ú ALT + 0218
Ñ ALT + 0209
Ü ALT + 0220

Lowercase
á ALT + 0225
é ALT + 0233
í ALT + 0237
ó ALT + 0243
ú ALT + 0250
ñ ALT + 0241
ü ALT + 0252

Punctuation
¿ ALT + 0191
¡ ALT + 0161
« ALT + 0171 (Left Angle Quote)
» ALT + 0187 (Right Angle Quote)
ALT + 0128
Los Verbos Regulars
-ar
ayudar to help
bailar to dance
besar to kiss
buscar to look for
caminar to walk
comprar to buy
conversar to converse
enseñar to teach
escuchar to listen
estudiar to study
hablar to speak
llegar to arrive
mirar to look at
nadar to swim
necesitar to need
preparar to prepare
regresar to return
tomar to take; to drink
trabajar to work
viajar to travel
-er
aprender to learn
beber to drink
comer to eat
creer to believe
leer to read
vender to sell
comprender to understand
-ir
abrir to open
asistir to attend
decidir to decide
escribir to write
recibir to receive
vivir to live
Las Conjugacións
-ar
Singular
yo -o
-as
él/ella/usted -a
Plural
nosotros -amos
ellos/ellas/ustedes -an
-er
Singular
yo -o
-es
él/ella/usted -e
Plural
nosotros -emos
ellos/ellas/ustedes -en
-ir
Singular
yo -o
-es
él/ella/usted -e
Plural
nosotros -imos
ellos/ellas/ustedes -en
Mathematical Symbols

Fractions
¼ ALT + 0188
½ ALT + 0189
¾ ALT + 0190

Exponents
± ALT + 241
ALT + 251
ALT + 252
¹ ALT + 0185
² ALT + 0178
³ ALT + 0179

Inequality
ALT + 247
< ALT + 60
> ALT + 62
ALT + 242
ALT + 243

Greek Symbols
π ALT + 227
Σ ALT + 228
µ ALT + 230
δ ALT + 235
ALT + 127

Sundry
ALT + 236
ALT + 239
° ALT + 248
Formulas:

Lines
General Form ax + by = c
Point Slope y – y1 = m (x – x1)
Slope Intercept y = mx + b

Circles
Standard Form (x – h)2 + (y – k)2 = r2
General Form x2 + y2 + ax + by + c = 0
More Formulas:

Stuff
d (P1, P2) d = √((x2 – x1)2 + (y2 – y1)2)
Midpoint (Mx = (X1 + X2) / 2 , My = (Y1 + Y2) / 2)
Slope or Average Rate of Change (A.R.M.) m = ⌂y / ⌂x
OR
m = rise / run
OR
m = (y2 – y1) / (x2 – x1)
Difference Quotient:
Slope in function notation
m = ⌂y / ⌂x
OR
m = (f(x + h) – f(x))/h
OR
m = (y2 – y1) / (x2 – x1)
Completing the square:

Stuff
Given x2 + bx + c = 0
Move Constant to RHS: x2 + bx = -c
Find (b/2)2 and add to both sides: x2 + bx + (b/2)2 = -c + (b/2)2
This is now a perfect Square Trinomial:
Factor it.
(x +b/2)2 = -c + (b/2)2
Example: x2 + y2 – 6x + 2y + 9 = 0
Move Constant to RHS: x2 – 6x + ___ + y2 + 2y + ___= -9 + ___ + ___
Find (b/2)2 x –> (b/2)2 = (-6/2)2 = (-3)2 = 9
y –> (b/2)2 = (2/2)2 = (1)2 = 1
…and add to both sides: x2 – 6x + 9 + y2 + 2y + 1 = -9 + 9 + 1
This is now two perfect Square Trinomials:
Factor them.
(x – 3)2 + (y + 1)2 = 1
Important Ions

Type I Monatomic Cations
H+
Li+ Be2+
Na+ Mg2+
K+ Ca2+
Rb+ Sr2+
Cs+ Ba2+
Fr+ Ra2+
Ag+ Zn2+ Al3+
Cd2+ Ga3+

Monatomic Anions
H
N3- O2- F
P3- S2- Cl
Br
I
At

What happens when you start throwing Hydrogen ions (protons) at the right side of the Periodic Table:
H+ + H —> H2 Hydrogen Gas
H+ + F —> HF Hydrofluoric Acid
H+ + Cl —> HCl Hydrochloric Acid
H+ + Br —> HBr Hydrobromic Acid
H+ + I —> HI Hydroiodic Acid
H+ + At —> HAt Hydroastatic Acid
2H+ + O2- —> H2O Water
2H+ + S2- —> H2S Hydrogen Sulfide
3H+ + N3- —> NH3 Ammonia
3H+ + P3- —> PH3 Phosphine

Type II Monatomic Cations
Hg22+ Mercury (I) Hg2+ Mercury (II)
Cu+ Copper (I) Cu2+ Copper (II)
Cr2+ Chromium (II) Cr3+ Chromium (III)
Mn2+ Manganese (II) Mn3+ Manganese (III)
Fe2+ Iron (II) Fe3+ Iron (III)
Co2+ Cobalt (II) Co3+ Cobalt (III)
Pb2+ Lead (II) Pb4+ Lead (IV)
Sn2+ Tin (II) Sn4+ Tin (IV)
Tl+ Thallium (I) Tl2+ Thallium (II) Tl3+ Thallium (III)

Polyatomic Anions
Carbons and Acids
HCO2 Formate HCOOH Formic Acid
CO32- Carbonate HCO3 Hydrogen Carbonate H2CO3 Carbonic Acid
C2H3O2 Acetate CH3COOH Acetic Acid
C2O42- Oxalate HC2O4 Hydrogen Oxalate HOOCCOOH Oxalic Acid
C6H5CO2 Benzoate C6H5COOH Benzoic Acid
Chlorates and Acids
ClO Hypochlorite HClO Hypochlorous Acid
ClO2 Chlorite HClO2 Chlorous Acid
ClO3 Chlorate HClO3 Chloric Acid
ClO4 Perchlorate HClO4 Perchloric Acid
Nitrates and Acids*
NO2 Nitrite HNO2 Nitrous Acid
NO3 Nitrate HNO3 Nitric Acid
*Chlorates, Nitrates, Bromates, and Iodates all pretty much follow the same pattern.
Chromates and Acids
CrO42- Chromate HCrO4 Hydrogen Chromate H2CrO4 Chromic Acid
Cr2O72- Dichromate HCr2O7 Hydrogen Dichromate H2Cr2O7 Dichromic Acid
Phosphates and Acids
PO43- Phosphate HPO42-
H2PO4
Hydrogen Phosphate
Dihydrogen Phosphate
H3PO4 Phosphoric Acid
Sulfates and Acids
SO32- Sulfite HSO3 Hydrogen Sulfite H2SO3 Sulfurous Acid
SO42- Sulfate HSO4 Hydrogen Sulfate H2SO4 Sulfuric Acid
S2O32- Thiosulfate

Sundry and Misc.
OH Hydroxide
O22- Peroxide
CN Cyanide
SCN Thiocyanate
MnO4 Permanganate
N3 Azide
NH4+ Ammonium
CH3NH3+ Methylammonium

One Response to “Escuela”


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