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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
108 amu
108 amu
215 amu
215 amu
161 amu
161 amu
179 amu
179 amu
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The total mass of the reactants can be calculated by adding the atomic masses of each element in the reactants.
FeCl3: 1 iron atom (Fe) = 56 amu, 3 chlorine atoms (Cl) = 3 * 35 amu = 105 amu
Total mass of FeCl3 = 56 amu + 105 amu = 161 amu
3H2O: 6 hydrogen atoms (H) = 6 * 1 amu = 6 amu, 3 oxygen atoms (O) = 3 * 16 amu = 48 amu
Total mass of 3H2O = 6 amu + 48 amu = 54 amu
Adding the total masses of FeCl3 and 3H2O:
161 amu (FeCl3) + 54 amu (3H2O) = 215 amu
Therefore, the total mass of the reactants is 215 amu.