BMB 207 Lecture Notes - Lecture 18: Iron(Iii) Oxide, Chemical Formula, Chemical Equation
21 Oct 2016
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The number that precedes a chemical formula in an equation is called a coefficient and shows the number of atoms, molecule, or formula units of that substance involved in the action reaction. Diatomic hydrogen gas reacts with diatomic oxygen gas to form water. A chemical equation contains the expression 2fecl3. Two fe (iii) and 6 cl (i) results in twelve atoms of total, balancing with six. Three charges in total, as there are three cl. An even easier way to look at it . Walk through this example: atoms each within the expression. Just get the same amount of element on either side of the reaction. Count the sides again to make sure it"s balanced properly: Al2o3 + hcl alcl3 + h2o. Next devise a way to balance the two through multiplications. First figure out how many are on each side:
