Monday, September 9, 2019

Chapter 03 : Chemical Formula and Equations


Chapter 03 : Chemical Formula and Equations









Chemical Formula and Equations - Subscripts

A chemical formula or equation shows the symbols of the elements in the compound and the ratio of the elements to one another. If a substance contains more than one atom of a particular element, this quantity is indicated in chemical formulas or equations using a subscript number after the element symbol. The subscript number refers only to the element it immediately follows. For example, the chemical formula for water is H2O which indicates that 2 atoms of Hydrogen combines with 1 atom of oxygen.
How to write a Chemical Formula or Equation using SubscriptsTo type or write a subscript for a chemical formula or equation just follow these simple instructions:
  • Type in the formula or equation for example H2O
  • Highlight the number
  • Click Format
  • Select Font... Decrease the font size of the number
  • Under the heading Effects tick the Subscript Box
  • The formula will now show the equation with the number in subscript - H2O

Chemical Formula and Equations

Chemical Formula and Equations - Examples and Meanings of SubscriptsFor example, the chemical formula for water is H2O which indicates that 2 atoms of Hydrogen combines with 1 atom of oxygen. The chemical formula for sodium chloride (Salt) is NaCl indicating that one atom of sodium combines with one atom of chlorine in a one-to-one ratio. Subscripts are added, following the element symbol, to indicate that the number of atoms of that element in the compound if it is greater than one. For example, the formula for magnesium bromide MgBr2 which indicates that one magnesium atom combines with two bromine atoms.
Meanings and Examples of Chemical Formula and EquationsThe following examples of Chemical Formula and Equations explain their meaning.
Example of Chemical Formula for Salt (Sodium Chloride) - NaCl
NaCl

Symbol Na indicates the element Sodium

Symbol Cl indicates the element Chlorine
No subscripts indicate only 1 atom for each element              
Example of Chemical Formula for Water - H2O
H2O

Symbol H indicates the element Hydrogen

Symbol O indicates the element Oxygen
Subscript indicates 2 atoms of Hydrogen

Chemical Formula and Equations - Common Chemical Formula List

The following list of Chemical Formula and Equations shows some of the most common chemical formulas.
Common Chemical Formula List
Na
Sodium
H2O
Water
C6H12O6
Glucose
C2H6OAlcohol
CaSO4
Sulfate Group
H2S
Hydrogen Sulfide
 NaCl
Salt
O2
Oxygen
C2H6O
Ethanol
C2H4O2Vinegar
NH3
Ammonia
Mg
Magnesium
C2H4O2
Acetic Acid
C4H10
Butane
NO3Nitrate
Cu
Copper
N2
Nitrogen
CO2
Carbon Dioxide
H2SO4
Sulfuric Acid
CH4
Methane
C12H22O11
Sucrose
C3H8
Propane
NaHCO3
Baking Soda
F
Fluoride
F2
Fluoride
H2O2
Peroxide
C8H10N4O2
Caffeine
NaCl
Sodium Chloride
C9H8O4
Aspirin
HCl
Hydrochloric Acid
Zn(NO3)2
Zinc
CO
Carbon Monoxide
NaOH
Sodium Hydroxide
NaCN
Sodium Cyanide
Ca(CN)2
Calcium Cyanide
Au
Gold
I
Iodine
Sn
Tin
C6H6
Benzene
H2S
Hydrogen Sulfide
CH3COCH3
Acetone
H3PO4
Phosphoric Acid
C5H12
Pentane
CH3OH
Methanol
HBr
Hydrobromic Acid
H2CO3
Carbonic Acid
Ti
Titanium
NaClO
Sodium Hypochlorite
C2H6
Ethane
(NH4)2SO4
Ammonium Sulfate
C8H18
Octane
CuSO4
Copper Sulfate
C27H46O
Cholesterol
C7H6O2
Benzoic Acid
H2SO3
Sulfurous Acid
C6H12O6
Galactose
C6H8O6
Ascorbic Acid
CO2
Dry Ice
NaNO3
Sodium Nitrate
CaO
Calcium Oxide
HIO3
Iodic Acid
C3H6O3
Lactic Acid
MgBr2
Lactic Acid
H2O
Water Vapor
No Formula
Oxide
C
Carbon
H
Hydrogen
CnH2nOnSugar
O4S2-
Sulfate
N2O
Nitrogen
C6H8O7
Citric Acid
C8H18
Octane
C10H16O
Camphor
AgISilver Oxide
As4O3
Arsenic Trioxide
Au2O3
Gold Trioxide
Au2S
Gold Sulfide
Br2Bromine
Al2O3
Aluminium foil
Common Chemical Formulas List

Chemical Formula and Equations

The above list of Chemical Formula and Equations provides details of the common Chemical Formulas.

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