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 C2H6O Alcohol CaSO4 Sulfate Group H2S Hydrogen Sulfide  NaCl Salt O2 Oxygen C2H6O Ethanol C2H4O2 Vinegar NH3 Ammonia Mg Magnesium C2H4O2 Acetic Acid C4H10 Butane NO3− Nitrate 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 CnH2nOn Sugar O4S2- Sulfate N2O Nitrogen C6H8O7 Citric Acid C8H18 Octane C10H16O Camphor AgI Silver Oxide As4O3 Arsenic Trioxide Au2O3 Gold Trioxide Au2S Gold Sulfide Br2 Bromine 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.