Use the equation and the table to answer the question.

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

179 amu
179 amu

161 amu
161 amu

215 amu
215 amu

108 amu
108 amu

Answer 1

To calculate the total mass of the reactants in the given reaction:

FeCl3 + 3H2O → Fe(OH)3 + 3HCl

We need to first calculate the molar mass of each reactant:

1. For FeCl3:

   • Iron (Fe): 1 × 56 amu = 56 amu
   • Chlorine (Cl): 3 × 35 amu = 105 amu
   • Total for FeCl3 = 56 amu + 105 amu = 161 amu

2. For 3H2O:

   • Hydrogen (H): 3 × 2 × 1 amu = 6 amu
   • Oxygen (O): 3 × 16 amu = 48 amu
   • Total for 3H2O = 6 amu + 48 amu = 54 amu

Now, adding the mass of the reactants together:

\[ \text{Total mass of reactants} = \text{mass of FeCl3} + \text{mass of 3H2O} \] \[ \text{Total mass of reactants} = 161 , \text{amu} + 54 , \text{amu} = 215 , \text{amu} \]

Therefore, the total mass of the reactants is 215 amu.