[rore-al-raja]

بنات سؤال ع السريع

19. A 0.271 g sample of an unknown vapor occupies 294 mL at 140C and 847 mmHg. The empirical formula of the compound is CH2. What is the molecular formula of the compound?

(A) CH2
(B) C2H4
(C) C3H6
(D) C4H8