Question

Calculate the molar mass of Al(OH)3.

Answer 1

The molar mass of Al(OH)3 is calculated by adding the molar masses of one atom of aluminum, three atoms of oxygen, and three atoms of hydrogen, resulting in 78.00 g/mol.

Step-by-step explanation:

Calculate the Molar Mass of Al(OH)3

To calculate the molar mass of aluminum hydroxide, Al(OH)3, you need to know the molar masses of its constituent elements. These are aluminum (Al), oxygen (O), and hydrogen (H).

From the periodic table, the molar masses are approximately:

Aluminum (Al) = 26.98 g/mol

Oxygen (O) = 15.999 g/mol

Hydrogen (H) = 1.008 g/mol

Al(OH)3 has one atom of aluminum, three atoms of oxygen, and three atoms of hydrogen. Using this information:

1x26.98 g/mol (Al) + 3x15.999 g/mol (O) + 3x1.008 g/mol (H) = 78.00 g/mol for Al(OH)3

So, the molar mass of aluminum hydroxide is 78.00 g/mol.

Answer 2

molecular mass Al(OH)₃ = 78 amu

Step-by-step explanation:

Molar mass = ∑ atomic masses

Al(OH)₃ => Al + 3O + 3H = 1(27amu) + 3(16amu) + 3(1amu) = (27 + 48 + 3)amu = 78amu*

*atomic mass units