The combustion analysis of l-carnitine, an organic compound thought to build muscle strength, reported its composition as 52.16% C, 9.38% H, 8.69% N, and 29.78% O. The osmotic pressure of 100.00 mL of solution containing 0.322 g of l-carnitine in methanol was found to be 0.501 atm at 32°C. Assuming that l-carnitine does not ionize in methanol, determine

(a) The molar mass;

(b) The molecular formula of l-carnitine.