1. ) ( ) ( ( ) ( ) ( ) ( ) 3.96 FIND CARBON FROM CO AND CO2
0.467g CO 1 mol CO mol C = mol C [from CO]
28.g mol CO
0.733g CO mol CO mol C = mol C [from CO2]
44. g mol CO2
ADD C FROM BOTH COMPOUNDS TO GET TOTAL C ( MOL C)
Convert the carbon into grams MOL x 12.0 g/mol = g C ) ( ) ( ( ) ( )
FIND H FROM WATER,
0.450g H2O mol H2O mol H = mol H = 0.050g H
18 g H2O mol H2O ( ) ( )
HEY BUBBIES!, you could have found H by subtracting the C (.40005g) from the sample (0.450g) to get H as .050 grams! E-Z

2. NOW FIND YOUR EMPIRICAL FORMULA FROM THE MOLES!
C mol C/ = = 1 C
H mol H/ 0. = = 1.5 H C2H3 is your emp formula! ( ) ( )
0.467g CO 1 mol CO mol O = mol O [from CO]
28.g mol CO
0.733g CO mol CO mol O = mol O [from CO2]
44. g mol CO2
THAT’S .O49996 MOL O X G/MOL = g
rounded to 0.800g ( ) ( )