Given the chemcal equation:2 Ca+O2>2 CaO,if 2 moles of CaO are formed in this reaction,then 2 moles of O2 must have reacted. True or False?
Of course not. 2 mol CaO formed means 1 mol O2 used.
To determine if 2 moles of O2 reacted in the given chemical equation, we need to first examine the stoichiometry of the reaction, as indicated by the coefficients in the balanced equation:
2 Ca + O2 -> 2 CaO
The coefficient in front of O2 is 1, which means that for every 1 mole of O2, 2 moles of CaO are produced.
Since the question states that 2 moles of CaO are formed, we can determine the number of moles of O2 reacted by using the stoichiometry ratio.
If 2 moles of CaO are formed, then according to the stoichiometry of the reaction, we know that 2 moles of CaO would require 1 mole of O2.
Therefore, based on the stoichiometry of the equation, if 2 moles of CaO are formed, only 1 mole of O2 must have reacted.
So the statement "2 moles of O2 must have reacted" is false.