Which of the following pairs does not share the same empirical formula? (3 points)

C2H6 and C4H12
C3H6O3 and C2H4O2
C3H8O and CH2O
C2H8 and CH4

Question

Which of the following pairs does not share the same empirical formula? (3 points)
 	
	C2H6 and C4H12
	C3H6O3 and C2H4O2
	C3H8O and CH2O
	C2H8 and CH4

anonymous · Answer

The empirical formula of a compound is found by reducing its coefficients as much as possible without changing their ratios. For example:$$H_{4}O_{2} -->H_{2}O_{1}$$Try doing that to the four answer choices. One should come out with a different ratio when you're done.

anonymous · Answer

is it the third one?

anonymous · Answer

Yup! The ratio for the first compound is 3:8:1, whilst the second has a ratio of 1:2:1. These are different, meaning that their empirical formulas don't match up.

anonymous · Answer

Could you help me with this one too? Question: Use complete sentences to explain how you determined the mass of oxygen in the compound produced in the virtual lab, and how the mass of each element can be used to determine the empirical formula of the compound. Link to experiment: http://media.orvsd.org/FLVS/MASTER_w_images_backup-chemistry-20120216-1404/course_files/flvs/educator_chemistry_v10_gs/module03/03_09c.htm