Question

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

108 amu
108 amu

161 amu
161 amu

179 amu
179 amu
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Answer 1

To calculate the total mass of the reactants in the reaction \( \text{FeCl}_3 + 3\text{H}_2\text{O} \), we need to find the masses of each reactant based on the given atomic masses:

1. **Calculate the mass of \(\text{FeCl}_3\)**:
- Iron (Fe): 1 atom × 56 amu = 56 amu
- Chlorine (Cl): 3 atoms × 35 amu = 105 amu
- Total mass of \(\text{FeCl}_3\) = 56 amu + 105 amu = 161 amu

2. **Calculate the mass of \(3\text{H}_2\text{O}\)**:
- Each water molecule (\( \text{H}_2\text{O} \)) consists of 2 hydrogen (H) and 1 oxygen (O).
- Hydrogen: 2 atoms × 1 amu = 2 amu per molecule
- Oxygen: 1 atom × 16 amu = 16 amu per molecule
- Total mass of 1 water molecule = 2 amu + 16 amu = 18 amu
- For 3 water molecules: 3 × 18 amu = 54 amu

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

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

The correct response is **215 amu**.