(a) Show that the formula mass of NaCl is 58.443 (0.0012) g/mol. (b) To prepare a solution of NaCl, you weigh out 2.634 (0.002) g and dissolve it in a volumetric flask whose volume is 100.00 (0.08) mL. Express the molarity of the solution, along with its uncertainty, with an appropriate number of digits. 3-
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Formula mass is obtained by adding all the mass of atoms present in the given formula of a compound. Formula weight or molecular weight is its other name. It is expressed in the atomic mass unit (AMU).