Which of these mole ratios is possible for this reaction? fecl3 + 3naoh → fe(oh)3 + 3nacl 1: 1 1: 3 3: 1 2: 3

FeCl3 reacts with NaOH follows the formula: FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl.  In this reaction, the molar ratio of the two reactants is 1:3.  So in order for both reactants to react with each other completely, ratio needs to be 1:3.  Any other ratio is not possible to give a complete reaction, in another word, there would be one or the other reactant left over.

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.