Whats the unit for mass

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Find the mass, in grams, of 5.00*10^23 molecules of f2

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?