What is the molar mass of CO(OH)2?

To calculate the molar mass of CO(OH)₂, also known as cobalt(II) hydroxide, you need to sum the atomic masses of each atom present in the compound. The molar mass is the mass of one mole of a substance, and it is typically expressed in grams per mole (g/mol). Here's how you can calculate it:

1. Identify the elements in CO(OH)₂:
- Cobalt (Co)
- Oxygen (O)
- Hydrogen (H)

2. Determine the number of atoms of each element in the compound:
- There is 1 atom of cobalt (Co).
- There are 2 atoms of oxygen (O) in each hydroxide group, and since there are two hydroxide groups, that makes a total of 4 oxygen atoms.
- There are 2 atoms of hydrogen (H) in each hydroxide group, and with two hydroxide groups, that makes a total of 4 hydrogen atoms.

3. Find the atomic mass of each element from the periodic table (rounded to two decimal places for simplicity):
- Cobalt (Co): 58.93 g/mol
- Oxygen (O): 16.00 g/mol
- Hydrogen (H): 1.01 g/mol

4. Multiply the atomic mass of each element by the number of atoms of that element in the compound:
- Cobalt: 58.93 g/mol × 1 = 58.93 g/mol
- Oxygen: 16.00 g/mol × 4 = 64.00 g/mol
- Hydrogen: 1.01 g/mol × 4 = 4.04 g/mol

5. Add the masses from step 4 to find the total molar mass of CO(OH)₂:
- Total molar mass = 58.93 g/mol (cobalt) + 64.00 g/mol (oxygen) + 4.04 g/mol (hydrogen)
- Total molar mass = 126.97 g/mol

Therefore, the molar mass of CO(OH)₂ is 126.97 g/mol.