Question

A gaseous hydrocarbon, in a volume of 25.9 L at 401 K and a pressure of...

A gaseous hydrocarbon, in a volume of 25.9 L at 401 K and a pressure of 3.43 atm, reacts in an excess of oxygen to give 145.9 g of H2O and 356.4 g of CO2. Determine the molecular formula of the hydrocarbon.
0 0
Add a comment Improve this question Transcribed image text
Answer #1

Ans :

Number of mol of CO2 = mass / molar mass

= 356.4 g / 44.01 g / mol = 8.1 mol

mol H2O = 145.9 g / 18.01528 g/mol = 8.1 mol

Mol H = 2 x 8.1 mol = 16.2 mol

So the ratio of C and H atoms in the hydrocarbon = 8 : 16

The molecular formula of the hydrocarbon will be C8H16

Add a comment
Know the answer?
Add Answer to:
A gaseous hydrocarbon, in a volume of 25.9 L at 401 K and a pressure of...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT