The equation also identifies that all the compounds are in the gaseous state. It also indicates that two oxygen molecules are required for every methane molecule and that the reaction will form two water molecules and one carbon dioxide molecule for every methane and two oxygen molecules that react.
This equation indicates that oxygen and CH 4 react to form H 2O and CO 2. Molar ratios can be derived from the coefficients of a balanced chemical equation.Īs an example, the formula for the burning of methane can be written as follows: Molar rations state the proportions of reactants and products that are used and formed in a chemical reaction. Chemical reactions are balanced by adding coefficients so that the number of atoms of each element is the same on both sides.įrom a balanced equation, molar ratios can be derived. Stoichiometry is the study of the relative quantities of reactants and products in chemical reactions and how to calculate those quantities. Aqueous means dissolved in water it is a common state of matter for acids, bases, and dissolved ionic compounds. For example, a compound in the gas state would be indicated by (g), solid (s), liquid (l), and aqueous (aq). The state of matter of each compound or molecule is indicated in subscript next to the compound by an abbreviation in parentheses. Each individual substance’s chemical formula is separated from others by a plus sign. Reactants and products are separated by an arrow symbol (“→” usually read aloud as “yields”). The coefficients next to the symbols of entities indicate the number of moles of a substance produced or used in the chemical reaction. The reactants (the starting substances) are written on the left, and the products (the substances found in the chemical reaction) are written on the right. Conventions for writing chemical equations A chemical equation is the symbolic representation of a chemical reaction.
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