If your child was born on Christmas, you may hear complaints about fewer birthday presents than other kids and more holiday hoo-ha to contend with. (Both most definitely first-world problems.). As it turns out, Christmas birthdays are not only unfortunate -- they're also almost uniquely uncommon. In fact, December 25 is the least common birthday out of all the days of the year save the one that doesn't even occur annually -- February 29.
In a decomposition reaction a compound is broken into smaller chemical species. AB â A + B. The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction : 2 H 2 O â 2 H 2 + O 2. Another example is the decomposition of potassium chloride into potassium and chlorine gas.
Two or more reactants yielding one product is another way to identify a synthesis reaction. For example, simple hydrogen gas combined with simple oxygen gas can produce a more complex substance-----water! The chemical equation for this synthesis reaction looks like: 2H2 + O2 -----> 2H2O S + O2 -----> SO2 sulphur oxygen sulphur dioxide DECOMPOSITION REACTION: In a decomposition reaction a more complex substance breaks down into its more simple parts. One reactant yields 2 or more products. Basically, synthesis and decomposition reactions are opposites. For example, water can be broken down into hydrogen gas and oxygen gas. The chemical equation 2H2O -----> 2H2 + O2