Please EXPLAIN and solve EACH/ALL part(s) in Question #1!

DOUBLE CHECK YOUR WORK AND ANSWER(S).

PLEASE NEATLY SHOW ALL WORK, EXPLANATIONS, & CALCULATIONS STEP-BY-STEP USING PEN AND PAPER! I AM NEW TO CHEMISTRY! I AM A COMPLETE NEWBIE!

1. PFAS, or Per and Polyfluoroalkyl Substances, are a class of chemicals used in everything from food packaging and cookware to upholstery, clothing, and firefighting foam. These chemicals do not break down in the environment and are commonly found in dust, air, soil and water. Perfluorooctanoic acid (PFOA) is one type of PFAS compound. The structure of PFOA is given below: F F F F F F WW C OH F F a. Determine the molecular formula and calculate the molar mass of PFOA. (2 pts) b. In 2021, the highest concentration of PFOA that Madison Water Utility detected in the city water was 1.38 ng/L**. How many molecules of PFOA are in 1.38 nanograms? (4 pts) c. Using your answer to b, how many fluorine atoms are in 1.38 ng of PFOA? (2 pts) **Note: 1.38 ng/L is well below the recommended groundwater standard of 20 ng/L for PFAS