Question #39025

1 Answer
Aug 19, 2017

CH4

Explanation:

As always, it is useful to assume 100g of unknown compound, and then we interrogate its atomic composition:

Moles of C = 75g12.011gmol1=6.24molC

Moles of H = 25g100794gmol1=24.8molH

And we divide thru by the SMALLEST molar quantity to get......

C6.24mol6.24molH24.8mol6.24mol=CH4.

Clearly, the question was devised purely for pedagogy, as the unknown compound is methane on the basis of these data - it would be hard to collect combustion data on a gas.