# Does CuSO4•0H2O have a molar mass of 177.636?

pteromys.melonisland.n et/scripts/molarmass.html
->its a molar mass calculator

I think that's right
but I'm not completely sure

great! thanks

What does the 0 mean for mols H2O? If you intended to write CuSO4 with zero mols H2O, then 177 is not correct. CuSO4.H2O is 177.625

## The "0" in CuSO4•0H2O indicates that there are no molecules of water (H2O) present in the compound. However, it is important to note that CuSO4 is typically written as CuSO4•5H2O, which means there are five molecules of water associated with each molecule of CuSO4.

The molar mass of CuSO4•5H2O is actually 249.68 g/mol. The molar mass calculation involves adding up the atomic masses of each individual element in the compound.

So, to calculate the molar mass of CuSO4•5H2O, you would multiply the atomic mass of copper (Cu) by one, the atomic mass of sulfur (S) by one, the atomic mass of oxygen (O) by four, and the atomic mass of hydrogen (H) by ten (since there are five water molecules). Then, you would add up all these values:

Cu: 1 x atomic mass of Cu = 1 x 63.55 g/mol = 63.55 g/mol
S: 1 x atomic mass of S = 1 x 32.07 g/mol = 32.07 g/mol
O: 4 x atomic mass of O = 4 x 16.00 g/mol = 64.00 g/mol
H: 10 x atomic mass of H = 10 x 1.01 g/mol = 10.10 g/mol

Add these values together: 63.55 + 32.07 + 64.00 + 10.10 = 169.72 g/mol

However, CuSO4•0H2O is not a commonly recognized compound, so it may be a typographical error. If you meant to write CuSO4 without any water molecules, then the molar mass of CuSO4 is 159.61 g/mol.