Weegy: A. combustion User: When the equation Fe + O2 Fe2O3 is balanced, the coefficient for O2 is:
D. 1 Weegy: The answer is B. reactant User: This symbol indicates:
A. that the reaction is reversible.
B. that heat must be applied.
C. an incomplete combustion reaction.
D. that a gas is formed by the reaction. Weegy: We can not see the symbol. We can only see a question mark. Can you explain the ... (More)