covert 12.64 g NaOH to moles
To calculate moles, use the formula Mol = Mass/ Mr.... Mr of NaOH is 23+ 16 + 1 = 40.... Mol = 12.64/40 = 0.316
no of moles = mass/molar massmass = 12.64 gmolar mass = 40 g/molno of moles = 12.64/40no of moles = 0.316 g