Examples: NaCl, H2, =, +, ----------------->, ↔, (s), etc.
A chemical equation is the representation of a chemical reaction.
They are terms of an expression or an equation
Chemical formulas of reactants and products; number of molecules involved in the reaction.
Letters and symbols are used in equations to represent quantities, sometimes known or unknown. For example the symbol π (pi) represents the constant 3.14… and is unchanging. X or Y in an equation represent unknown terms that may vary depending on the equation, and other variables in the equation. There are numerous examples of both symbols and letters used in mathematical equations, but almost always they are either referring to a known constant term that is more simply expressed as a symbol, or an unknown or general term yet to be concretely determined.
No, NaCl H2O is not a chemical equation. An equation must have an equal sign. And even if you put an equal sign into those terms, it is not true that NaCl = H2O, so that would be a false equation, not a complete and balanced equation. You are not even close to having that.
Mole Ratio :)
An expression is a collection of terms which are separated by addition or subtraction symbols. Often it represents one side of an equation or a formula.
The equals sign ( = ). In fact it defines any equation, linear or not, since an equation is a statement that a particular value or term is equal to, so the result of solving, a second set of terms and operators. Any other symbols would be particular to the equation you have derived or are trying to solve.
There are two terms: 3x, -2b. Yeah, two terms. But where is the equation?
Unfortunately, the browser used for posting questions is hopelessly inadequate for mathematics: it strips away most symbols. There is no equality sign in the question and so there is no equation. Furthermore, there are no symbols (operators) between the terms. It makes little sense for me to try and guess - I may as well make up my own question and answer that!
element product atom
Unfortunately, this website is unable to reproduce many mathematical symbols. Please re-submit your question with terms like "plus" and "equals" written out.