A mixture of cyclopropane gas and oxygen is used as an anesthetic. Cyclopropane contains 85.7% C and 14.3% H by mass. At 50.0 degrees C and 0.984 atm pressure, 1.56 g cyclopropane has a volume of 1.00 L. What is the molecular formula of cyclopropane?
I don't know what formula to use that would give me a molecular formula...does anyone know what to use in this case?
2006-11-15 08:43:52 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1) I know that cyclopropane is C3H6
50c=323K
22.414 l/mole at STP
22.414*323/273/.984=26.95 l
1l 1/26.95 moles
1.56g 1/26.95 moles
1.56*26.95=42 g/mole
C:H mass ratio =.857+.143=6:1
mole ratio C 6/12=.5
H: 1/1=1
mole ratio is 1 C to 2 H
or CH2
c=12, H2=2 12+2=14
42/14=3
so formula is C3H6
2006-11-15 09:01:50 · answer #1 · answered by yupchagee 7 · 11⤊ 0⤋
It would be better to post this in the Chemistry section.
2006-11-15 17:00:06 · answer #2 · answered by modulo_function 7 · 0⤊ 0⤋