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 161 amu 161 amu 215 amu 215 amu 179 amu 179 amu Skip to navigation

Answer 1

To calculate the total mass of the reactants in the reaction, we need to find the mass of each reactant and add them together.

The reaction is: \[ \text{FeCl}_3 + 3\text{H}_2\text{O} \]

Step 1: Calculate the mass of FeCl\(_3\):

• Iron (Fe): 1 atom with mass = 56 amu
• Chlorine (Cl): 3 atoms with mass = 3 × 35 amu = 105 amu

So, the total mass of FeCl\(_3\): \[ 56 \text{ amu} + 105 \text{ amu} = 161 \text{ amu} \]

Step 2: Calculate the mass of 3H\(_2\)O:

• Hydrogen (H): 2 atoms per molecule, and there are 3 water molecules, so total H = 3 × 2 = 6 atoms with mass = 6 × 1 amu = 6 amu
• Oxygen (O): 3 atoms with mass = 3 × 16 amu = 48 amu

So, the total mass of 3H\(_2\)O: \[ 6 \text{ amu} + 48 \text{ amu} = 54 \text{ amu} \]

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

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