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
A. 215 amu
B. 179 amu
C. 161 amu
D. 108 amu
To find the total mass of the reactants, we need to calculate the molar mass of each reactant and then add them together.
FeCl3 molar mass = (1 Fe atom x 56 amu/atom) + (3 Cl atoms x 35 amu/atom)
FeCl3 molar mass = 56 amu + 105 amu
FeCl3 molar mass = 161 amu
H2O molar mass = (2 H atoms x 1 amu/atom) + (1 O atom x 16 amu/atom)
H2O molar mass = 2 amu + 16 amu
H2O molar mass = 18 amu
Total mass of reactants = FeCl3 molar mass + H2O molar mass
Total mass of reactants = 161 amu + 18 amu
Total mass of reactants = 179 amu
Therefore, the total mass of the reactants is 179 amu.
Answer: B. 179 amu
To find the total mass of the reactants, we need to add up the atomic masses of each element in the reactants.
For FeCl3, we have:
- 1 atom of Fe with a mass of 56 amu
- 3 atoms of Cl with a mass of 35 amu each (3 x 35 amu)
So the total mass of FeCl3 is 56 amu + 3 x 35 amu = 161 amu.
For H2O, we have:
- 2 atoms of H with a mass of 1 amu each (2 x 1 amu)
- 1 atom of O with a mass of 16 amu
So the total mass of H2O is 2 x 1 amu + 16 amu = 18 amu.
Now we add the masses of FeCl3 and H2O to get the total mass of the reactants:
161 amu + 18 amu = 179 amu.
Therefore, the total mass of the reactants is 179 amu.
The answer is B. 179 amu.
To find the total mass of the reactants, we need to calculate the mass of each element in the reactants and then add them together.
Given that:
- Fe (Iron) has a mass of 56 amu.
- Cl (Chlorine) has a mass of 35 amu.
- H (Hydrogen) has a mass of 1 amu.
- O (Oxygen) has a mass of 16 amu.
Based on the balanced chemical equation, the reactants are FeCl3 and H2O.
The molecular formula of FeCl3 indicates that it contains 1 atom of iron (Fe) and 3 atoms of chlorine (Cl). So, the mass of iron chloride (FeCl3) can be calculated as follows:
Mass of FeCl3 = (Mass of Fe) + (3 * Mass of Cl) = 56 amu + (3 * 35 amu) = 56 amu + 105 amu = 161 amu.
The molecular formula of water (H2O) indicates that it contains 2 atoms of hydrogen (H) and 1 atom of oxygen (O). So, the mass of water (H2O) can be calculated as follows:
Mass of H2O = (2 * Mass of H) + (1 * Mass of O) = (2 * 1 amu) + (1 * 16 amu) = 2 amu + 16 amu = 18 amu.
Now, we can find the total mass of the reactants by adding the masses of iron chloride (FeCl3) and water (H2O):
Total mass of the reactants = Mass of FeCl3 + Mass of H2O = 161 amu + 18 amu = 179 amu.
Therefore, the correct answer is B. 179 amu.