Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

Chemical analysis of one of the constituents of gasoline showed that it consists of 92.29% carbon and 7.71% hydrogen by mass. If the molecular mass of the

compound is 78 g/mol, determine its molecular formula. (C6H6)
Do you use carbon=12amu and hydrogen =1amu ?



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The compound is CnHm 

(\frac{78g}{mol}) (0.9229) = \frac{71.9862g}{mol}  (mass of Carbon)

(\frac{71.9862g}{mol})( \frac{1mol}{12g}) = 5.998 = 6  = n

(\frac{78g}{mol}) (0.0771) = \frac{6.0138g}{mol}  (mass of Hydrogen)

(\frac{6.0138g}{mol})( \frac{1mol}{1g}) = 6.0138 = 6  = m

Its Molecular Formula is C₆H₆ 
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts