alcohol	methanol		ethanol		1-propanol		2-propanol	
concentration	tangent	Y	tangent	Y	tangent	Y	tangent	Y
wt%	delta	error	delta	error	delta	error	delta	error
0	1.07308	1.07308	1.07308	1.07308	0.01073	0.01073	0.01073	0.01073
10	1.5	1.387	1.364	1.4	0.015	0.01387	0.01364	0.014
20	0.92	1.366	1.117	0.966	0.0092	0.01366	0.01117	0.00966
30	0.66	1.12	0.517	0.706	0.0066	0.0112	0.00517	0.00706
40	0.56	0.718	0.328	0.2202	0.0056	0.00718	0.00328	0.0022
50	0.38	0.113	0.117	0.129	0.0038	0.00113	0.00117	0.00129