What must all chemical equations have?

Answer 1

-The elements involved.
-The specific number of each element in the molecule.


Strictly speaking, you do not need to know the arrangement of the elements in the molecule...but writing the arrangement is often the best thing to do.


Like CH3CH2CH3 could be written C3H8 and still be correct. However it's a little less clear.


I would advise, as general practice, to always write the chemical formula out in full, then abbreviate it after much confidence is gained. Otherwise you are just asking for a lot of confusion.

Answer 2

An equal sign. The implications of the equal sign are left to the asker to determine (but see "balanced chemical equation" for some insights). In other words, it would be nice of the equal sign created a true statement. And by "nice", I mean required. Otherwise the false statement is just nonsense.

Answer 3

The chemical formula of the compounds and their atomic weight and valencies

Answer 4

All chemical equations must have chemical formulas of reactants and products, coefficients to balance the equation, and an arrow to represent the direction of the reaction (yield sign if reversible).

Answer 5

What the products are.