A chemical equation is composed of chemical formulas. It has reactants on the left and products on the right side of an arrow symbol (→). The arrow is usually read out as ‘yields’. In an equation, all chemical formulae on one side are separated by a plus sign. The physical state...
There are a number of other symbols used in chemical equations. A symbol written above or below the reaction arrow indicates special reaction conditions. For example, when mercuric oxide is heated it decomposes into mercury metal and oxygen gas; this reaction is shown by the equation 2HgO→∆...
Chemists ordinarilyworkwith weighable quantities ofelementsandcompounds. For example, in the iron-sulfur equation the symbol Fe represents 55.845 grams of iron, S represents 32.066 grams of sulfur, and FeS represents 87.911 grams of iron sulfide. Because matter is not created or destroyed in a ch...
separated by + symbols. CH 4 + 2 O 2 → CO 2 + 2 H 2 O Coefficient Reading Chemical Equations • The two sides of the equation are separated by an arrow. – The combination of chemicals before the reaction are on the left side of the arrow – The right side indicates the combina...
When the reactants and products of a chemical equation have the same number of atoms of all elements present, we say that an equation is balanced. All proper chemical equations are balanced. If a substance does not have a coefficient written in front of it, it is assumed to be 1. Also...
Chemical Equation Module Using the Chemical Equation Module (CEM) How to use the Superscript tool: How to use the Subscript tool: How to use the Isotope tool: How to use the Arrow tool, How to use the States of Matter tool, How to use the Greek Letters tool, Entering a chemic...
Components of a chemical equation Furthermore, the physical state of each element is also noted after their chemical symbols/formulas in a subscript format. Talking about subscripts, the numbers written in subscripts after a chemical symbol indicate the number of atoms of the element that are prese...
Chemical equation AChemicalEquationdescribes a relationship between twoChemicalFormulas, and can be constructed using one the arrow operators between two chemical formulas. These arrow operators represent different relationsips between the sides of the equation, and are as follows: ...
cao + h 2 s the correct formulas of the products are always written on the right side of the equation. cas + h 2 o→ cao + h 2 s the reactants and products are separated by an arrow pointing toward the products. cas + h 2 o→ cao + h 2 s this arrow means “ to produce ...
(l), which means it is a liquid. Another symbol you may see is (aq), which means the chemical species is in water — or anaqueous solution. The (aq) symbol is a sort of shorthand notation for aqueous solutions so that water doesn't have to be included in the equation. It's ...