Question

Formula mass of water for (CaCl2*2H2O) and (NaH2PO4*H2O) ?????
Please help!

Answer 1

Formula mass = the sum of atomic masses of all atoms in the chemical formula of a substance

Answer 2

Molar mass of CaCl2 2H2O = 147.01456 g/mol
Molecular weight calculation:
40.078 + 35.453*2 + 2*(1.00794*2 + 15.9994)
http://www.convertunits.com/molarmass/CaCl2+2H2O

Molar mass of NaH2PO4 H2O = 137.992291 g/mol
Molecular weight calculation:
22.98977 + 1.00794*2 + 30.973761 + 15.9994*4 + (1.00794*2 + 15.9994)

http://www.convertunits.com/molarmass/NaH2PO4+H2O

Answer 3

@Cuanchi thank you!