Which of the following is not true regarding a properly written chemical equation?
A It must contain proper chemical formulas.
B It must be balanced.
C It should represent known data.
D It must show the formation of a precipitate or a gas.
D. It must show the formation of a precipitate or a gas, is the statement that is not true because a properly written chemical equation must contain a proper chemical formula, must be balanced and should represent a known data.
