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

215 amu
215 amu

179 amu
179 amu

108 amu
108 amu

161 amu

Answer 1

To calculate the total mass of the reactants in the equation:

\[ \text{FeCl}_3 + 3\text{H}_2\text{O} \]

we need to find the masses of all the reactants.

1. Mass of \( \text{FeCl}_3 \):

   • 1 Iron (Fe) = 56 amu
   • 3 Chlorine (Cl) = 3 * 35 amu = 105 amu
   • Total mass of \( \text{FeCl}_3 = 56 + 105 = 161 \) amu

2. Mass of \( 3\text{H}_2\text{O} \):

   • For 1 \( \text{H}_2\text{O} \):
     • 2 Hydrogen (H) = 2 * 1 amu = 2 amu
     • 1 Oxygen (O) = 16 amu
     • Total mass of \( \text{H}_2\text{O} = 2 + 16 = 18 \) amu
   • Mass of \( 3\text{H}_2\text{O} = 3 * 18 = 54 \) amu

3. Total mass of the reactants: \[ \text{Total mass} = \text{Mass of } \text{FeCl}_3 + \text{Mass of } 3\text{H}_2\text{O} = 161 \text{ amu} + 54 \text{ amu} = 215 \text{ amu} \]

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