How to find the empirical formula of an unknown reactant?

[Coderhk]

Homework Statement

The problem is attached in uploads

Homework Equations

The periodic table, all other relevant info given in question

The Attempt at a Solution

Well, first I would attempt to convert all the products into moles so I can compare the more rations of the products. Firstly, the CO2 become 0.950 moles and H2O becomes 0.19 moles. After that I am completely lost. Thanks

Never mind I got it. Thanks anyways

 

[Borek]

Note: this kind of a problem is called "combustion analysis" and is quite common.