An unknown gaseous substance has a density of 1.06 g/L at 31 C ...

[jessicacav]

An unknown gaseous substance has a density of 1.06 g/L at 31 C and 371 torr. If the substance has the following percent composition: 88.8 C and 11.2 H, its molecular formula is ________.
 
  A) CH3
  B) C2H3
  C) C4H6
  D) C2H5

Question 2

An unknown gaseous substance has a density of 1.06 g/L at 31 C and 371 torr. Its molecular weight is ________.
 
  A) 27 g/mol
  B) 54 g/mol
  C) 81 g/mol
  D) 108 g/mol

[sailorcrescent]

Answer to Question 1

C

Answer to Question 2

B

[jessicacav]

Excellent

[meganmoser117]

Thanks for the timely response, appreciate it