Question

Is it possible for two different compounds to be made from the exact same two elements? Why or why not?

Answer 1

Yes, it is possible because two elements can form different compounds by changing the ratio - methane is CH4 and ethane is C2H6.

Answer 2

Yes, it is possible to combine the same two elements to form two different compounds. An example is carbon dioxide CO2 and carbon monoxide CO. This is because two elements can form different types of bond and end up with different compounds.