user: Question: what is the mol.weight (daltons) when the percent of mass is 1.5?
Columns: ['Molecule', 'Percent of Mass', 'Mol.Weight (daltons)', 'Molecules', 'Percent of Molecules']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Water', '65*', '18*', '1.74e14*', '98.73*']
SQL:

assistant: SELECT "Mol.Weight (daltons)" FROM "Table" WHERE "Percent of Mass" = '1.5';