Question

A sample of 1.200 g of vitamin C is burned in the presence of excess of oxygen to yield 1.799 g of carbon dioxide and 0.491 g of water. Vitamin C contains only carbon, hydrogen, and oxygen 1) a) Calculate the mass percent composition of vitamin C b) Determine the empirical formula of vitamin C 2) Burning a 0.1500 g sample of a carbon-hydrogen-oxygen g CO2 and 0.1500 g H20. Show all work. compound in oxygen forms a) Calculate the mass percent composition of this compound (3 points) b) Determine the empirical formula of this compound (3 points)

Answer 1

mass of swang le= L. 200 g meles of Co2 CO 1:79 2 x 0.431 18 man of sample 40-886冫 mass percent of H 4.546 of osgm

les of actoms S,male tio Simplest rvctio 3 4 3.4 3 4 3 3. 4 A- 3 a les o wa -o 2930 x 12 of sample 53.27 moles of H-atoms - 2x roles

티 ement s 53.27 t I 12. -I 2.' S (ชา