Assertion: rubber | /r/HasAspect | the empirical simplestformula
Facets:
Source sentences:
text: In 1826 English chemist Michael Faraday (1791–1867) analyzed natural rubber and found it to have the empirical (simplest) formula C5H8, along with 2 to 4 percent protein and 1 to 4 percent acetone-soluble materials (resins, fatty acids, and sterols).