Conservation in Chemical Reactions Quick Check 3 of 43 of 4 Items 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 161 amu 161 amu 179 amu 179 amu 108 amu
To find the total mass of the reactants, we need to add up the individual masses of each atom in the reactants.
FeCl3 has one Fe atom with a mass of 56 amu and three Cl atoms with a mass of 35 amu each. This gives a total mass of FeCl3 as 56 amu + (3 x 35 amu) = 56 amu + 105 amu = 161 amu.
H2O has two H atoms with a mass of 1 amu each and one O atom with a mass of 16 amu. This gives a total mass of H2O as (2 x 1 amu) + 16 amu = 2 amu + 16 amu = 18 amu.
Adding the total masses of FeCl3 and H2O together gives 161 amu + 18 amu = 179 amu.
Therefore, the total mass of the reactants is 179 amu.
To find the total mass of the reactants, we need to calculate the total mass of FeCl3 and 3H2O.
The atomic mass of Fe is 56 amu, and the atomic mass of Cl is 35 amu. Since there are three Cl atoms in FeCl3, the mass of FeCl3 is:
3(35 amu) + 56 amu = 105 amu + 56 amu = 161 amu
The atomic mass of H is 1 amu, and the atomic mass of O is 16 amu. Since there are 3H2O molecules, the mass of 3H2O is:
3(2(1 amu) + 16 amu) = 3(2 amu + 16 amu) = 3(18 amu) = 54 amu
Therefore, the total mass of the reactants (FeCl3 + 3H2O) is:
161 amu + 54 amu = 215 amu
So, the correct answer is 215 amu.
To find the total mass of the reactants, we need to calculate the sum of the atomic masses of all the atoms involved in the reaction.
FeCl3 is made up of one iron atom and three chlorine atoms. From the table, the atomic mass of iron (Fe) is 56 amu, and the atomic mass of chlorine (Cl) is 35 amu. Thus, the total mass of FeCl3 is:
1 iron atom (56 amu/atom) + 3 chlorine atoms (35 amu/atom) = 56 amu + 3 * 35 amu = 56 amu + 105 amu = 161 amu
Water (H2O) consists of two hydrogen atoms and one oxygen atom. The atomic mass of hydrogen (H) is 1 amu, and the atomic mass of oxygen (O) is 16 amu. Therefore, the total mass of H2O is:
2 hydrogen atoms (1 amu/atom) + 1 oxygen atom (16 amu/atom) = 2 amu + 16 amu = 18 amu
Now, we can calculate the total mass of the reactants by adding the mass of FeCl3 and H2O:
161 amu (mass of FeCl3) + 18 amu (mass of H2O) = 179 amu
Therefore, the correct answer is 179 amu.