To find the total mass of the reactants, we need to add up the individual masses of each atom in the reactants.
FeCl3 has one Fe atom with a mass of 56 amu and three Cl atoms with a mass of 35 amu each. This gives a total mass of FeCl3 as 56 amu + (3 x 35 amu) = 56 amu + 105 amu = 161 amu.
H2O has two H atoms with a mass of 1 amu each and one O atom with a mass of 16 amu. This gives a total mass of H2O as (2 x 1 amu) + 16 amu = 2 amu + 16 amu = 18 amu.
Adding the total masses of FeCl3 and H2O together gives 161 amu + 18 amu = 179 amu.
Therefore, the total mass of the reactants is 179 amu.
Conservation in Chemical Reactions Quick Check 3 of 43 of 4 Items Question Use the equation and the table to answer the question. FeCl3 + 3H2O → Fe(OH)3 + 3HCl Element Mass of an Atom (amu) Fe 56 Cl 35 H 1 O 16 Iron chloride and water react according to the equation shown. The table shows the atomic masses of the elements involved in the reaction. What is the total mass of the reactants? (1 point) Responses 215 amu 215 amu 161 amu 161 amu 179 amu 179 amu 108 amu
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