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) be? (1 point)

Question

219 amu
• 73 amu
• 75 amu
© 107 amu

Answer 1

To calculate the atomic mass of Fe(OH), you need to sum the atomic masses of its constituent elements.

The formula Fe(OH) indicates that there is one iron (Fe) atom and one hydroxide (OH) group.

1. The atomic mass of Iron (Fe) is 56 amu.
2. The hydroxide ion (OH) consists of:
   • Oxygen (O): 16 amu
   • Hydrogen (H): 1 amu

Now, calculate the mass of the hydroxide group:

• Mass of OH = Mass of O + Mass of H = 16 amu + 1 amu = 17 amu

Now combine the masses:

• Mass of Fe(OH) = Mass of Fe + Mass of OH = 56 amu + 17 amu = 73 amu

Thus, the atomic mass of Fe(OH) is 73 amu.