Author Question: A compound was discovered whose composition by mass is 85.6% C and 14.4% H. Which of the following ... (Read 49 times)

knemetz3 · **on:** Nov 5, 2023

Question 1

A 1.375 g sample of mannitol, a sugar found in seaweed, is burned completely in oxygen to give 1.993 g of carbon dioxide and 0.9519 g of water. The empirical formula of mannitol is
◦ CHO
◦ CH₇O₃

◦ C₃H₂O
◦ C₃H₇O₃

◦ CH₂O

Question 2

A compound was discovered whose composition by mass is 85.6% C and 14.4% H. Which of the following could be the molecular formula of this compound?
◦ CH₄

◦ C₂H₄

◦ C₃H₄

◦ C₂H₆

◦ C₃H₈

knguyen · **Reply #1 on:** Nov 5, 2023

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