Question

do these molecules make up the same substance? yes no

Explanation:

To determine if the molecules are the same substance, we analyze their molecular structures. The first molecule has a chain of 3 carbon atoms with a hydroxyl group (alcohol, like propanol), while the second has a carbonyl group (C=O) and a different carbon chain arrangement (like a ketone or aldehyde - based structure, e.g., propanone - related but actually, the first is propanol, the second is a different isomer or functional group - different compound). Since their functional groups and carbon - chain arrangements differ, they are not the same substance.

Answer:

no