Question

Use the equation and the table to answer the question.

FeCl3 + 3H2O → Fe(OH)3 + 3HCl

Atomic Masses of Elements
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

161 amu
161 amu

108 amu

Answer 1

FeCl3 mass = 56 + 3(35) = 56 + 105 = 161 amu
3 H2O mass = 3[2(1) + 16] = 3(18) = 54 amu
Total = 161 + 54 = 215 amu

Answer: 215 amu.