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
161 amu
161 amu
108 amu
108 amu
215 amu
215 amu
179 amu
FeCl3 + 3H2O → Fe(OH)3 + 3HCl
To find the total mass of the reactants, we need to calculate the mass of FeCl3 and H2O and add them together.
FeCl3:
Fe = 56 amu
Cl = 35 amu (x3 because there are 3 Cl atoms in FeCl3)
Total mass of FeCl3 = 56 + (35 * 3) = 56 + 105 = 161 amu
H2O:
H = 1 amu (x2 because there are 2 H atoms in H2O)
O = 16 amu
Total mass of H2O = (1 * 2) + 16 = 2 + 16 = 18 amu
Total mass of the reactants = Total mass of FeCl3 + total mass of H2O
= 161 amu + 18 amu
= 179 amu
Therefore, the correct answer is 179 amu.
To find the total mass of the reactants, we need to add the masses of each element in the reactants.
The molecular formula of Iron(III) chloride (FeCl3) consists of 1 atom of Fe and 3 atoms of Cl.
So, the total mass of FeCl3 = (1 x mass of Fe) + (3 x mass of Cl) = (1 x 56 amu) + (3 x 35 amu) = 56 amu + 105 amu = 161 amu.
The molecular formula of water (H2O) consists of 2 atoms of H and 1 atom of O.
So, the total mass of H2O = (2 x mass of H) + (1 x mass of O) = (2 x 1 amu) + (1 x 16 amu) = 2 amu + 16 amu = 18 amu.
Therefore, the total mass of the reactants (FeCl3 and H2O) = total mass of FeCl3 + total mass of H2O = 161 amu + 18 amu = 179 amu.
Hence, the correct answer is 179 amu.
To find the total mass of the reactants, you need to add up the atomic masses of all the atoms present.
Looking at the equation:
FeCl3 + 3H2O → Fe(OH)3 + 3HCl
The reactants are FeCl3 and 3H2O.
FeCl3 has one iron atom (Fe), which has a mass of 56 amu, and three chlorine atoms (Cl), each with a mass of 35 amu.
So the total mass of FeCl3 would be: 56 amu + (3 * 35 amu) = 56 amu + 105 amu = 161 amu.
Similarly, 3H2O has six hydrogen atoms (H), each with a mass of 1 amu, and three oxygen atoms (O), each with a mass of 16 amu.
So the total mass of 3H2O would be: (6 * 1 amu) + (3 * 16 amu) = 6 amu + 48 amu = 54 amu.
Adding up the masses of FeCl3 and 3H2O, we get: 161 amu + 54 amu = 215 amu.
Therefore, the total mass of the reactants in this reaction is 215 amu.
So the correct answer is: 215 amu.