From the Periodic table, it can be determined that iron (Fe) has an atomic mass of 56 amu, oxygen (O) has an atomic mass of 16 amu, and hydrogen (H) has a mass of 1 amu. What would the atomic mass of Fe(OH) 3 be?(1 point) Responses

Answer 1

To calculate the atomic mass of Fe(OH)₃, we need to consider the contributions from iron (Fe), oxygen (O), and hydrogen (H) in the formula.

1. Iron (Fe): There is 1 iron atom.

   • Atomic mass of Fe = 56 amu

2. Hydroxide (OH): There are 3 hydroxide ions in Fe(OH)₃.

   • Each hydroxide ion (OH) consists of 1 oxygen atom and 1 hydrogen atom.
   • Atomic mass of O = 16 amu
   • Atomic mass of H = 1 amu
   • Combined mass of OH = 16 amu + 1 amu = 17 amu

   Since there are 3 hydroxide ions:

   • Total mass of 3 OH = 3 × 17 amu = 51 amu

3. Total atomic mass of Fe(OH)₃:

   • Total mass = mass of Fe + mass of 3(OH)
   • Total mass = 56 amu + 51 amu = 107 amu

Therefore, the atomic mass of Fe(OH)₃ is 107 amu.