What is the molar mass of Cu(NO3)2?

The molar mass of copper(II) nitrate, Cu(NO₃)₂, can be calculated by adding together the molar masses of each element in the compound.

First, we need to identify the components of the compound:

• Copper (Cu): There is 1 atom of copper in the formula, and its molar mass is approximately 63.55 g/mol.
• Nitrogen (N): There are 2 nitrate ions (NO₃^–), which means there are 2 nitrogen atoms. The molar mass of nitrogen is about 14.01 g/mol, so for 2 nitrogen atoms, it will be 2 × 14.01 = 28.02 g/mol.
• Oxygen (O): Each nitrate ion contains 3 oxygen atoms, and with 2 nitrate ions in the formula, there are 6 oxygen atoms in total. The molar mass of oxygen is around 16.00 g/mol, which totals to 6 × 16.00 = 96.00 g/mol.

Now, we can add all these together:

• Molar mass of Cu: 63.55 g/mol
• Molar mass of N: 28.02 g/mol
• Molar mass of O: 96.00 g/mol

Adding these gives:

63.55 + 28.02 + 96.00 = 187.57 g/mol

Therefore, the molar mass of Cu(NO₃)₂ is approximately 187.57 g/mol.