Use the equation and the table to answer the
question.
FeCl + 3H O → Fe(OH) + 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)
3 2 3
161 amu
215 amu
179 amu
108 amu
To find the total mass of the reactants, we need to calculate the total mass of FeCl and 3H2O.
The total mass of FeCl is given by:
1 atom of Fe (56 amu) + 1 atom of Cl (35 amu) = 91 amu
The total mass of 3H2O is given by:
3 atoms of H (3 amu) + 2 atoms of O (32 amu) = 98 amu
Therefore, the total mass of the reactants is 91 amu + 98 amu = 189 amu.
The correct answer is not provided in the given options.
To find the total mass of the reactants, we need to calculate the sum of the atomic masses of each individual element in the reactants.
From the equation, we can see that there are 1 atom of Fe, 3 atoms of H, 1 atom of O, 1 atom of Fe, and 3 atoms of Cl involved in the reaction.
Using the atomic masses provided in the table, we can calculate the total mass of each element:
Mass of Fe = 1 atom of Fe × 56 amu = 56 amu
Mass of H = 3 atoms of H × 1 amu = 3 amu
Mass of O = 1 atom of O × 16 amu = 16 amu
Mass of Fe(OH) = Mass of Fe + Mass of O + Mass of H = 56 amu + 16 amu + 3 amu = 75 amu
Mass of Cl = 3 atoms of Cl × 35 amu = 105 amu
Now, to find the total mass of the reactants, we simply add up the mass of Fe(OH) and the mass of HCl:
Total mass of reactants = Mass of Fe(OH) + Mass of HCl = 75 amu + 105 amu = 180 amu
So, the correct answer to the question is 180 amu.
To find the total mass of the reactants, we need to sum up the masses of each element involved in the reaction.
In this case, we have FeCl and 3H2O as the reactants. Let's calculate the total mass for FeCl:
Mass of Fe = 56 amu
Mass of Cl = 35 amu
Therefore, the mass of FeCl = 56 amu + 35 amu = 91 amu.
Next, let's calculate the total mass for 3H2O:
Mass of H = 1 amu
Mass of O = 16 amu
Since each water molecule has 2H atoms and 1O atom, the mass of 1 H2O molecule is:
Mass of H2O = 2(1 amu) + 1(16 amu) = 18 amu
Therefore, the mass of 3H2O molecules is:
Mass of 3H2O = 3(18 amu) = 54 amu
Finally, we can calculate the total mass of the reactants by summing up the masses of FeCl and 3H2O:
Total mass of reactants = mass of FeCl + mass of 3H2O
Total mass of reactants = 91 amu + 54 amu = 145 amu
Therefore, the total mass of the reactants is 145 amu.