[billduck1]

Hallo to everyone.I am trying to solve a problem for my exams tommorow.
A gas mixtures contains CH4 and CH2CH6 that burns fully.We know the volume 5L.After the burn we have 300J.Which is v/v ?.

Can anyone help me?
Thank you!

[Arkcon]

Can you show us what you've done so far, and where you're stuck?  Can you begin to solve any of this problem?  Because it contains multiple steps.  Do you know what formulas to use, at each step?  Can you at least start with a balanced chemical equation?  Please trouble yourself to read the forum rules, posted in red, at the top of each page -- we like to help, but we won't do all the work for you.