I think it's option C and option D but if you can only choose one answer then I think it's option C
A physical exothermic process
Answer:
A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.
Explanation:
Flat as more oxygen and water can react over it think of it like this would a cube rust faster than a sheet
Find the density of the plastic. if the density is less than that of water, it's going to float. If it's more than the density of water, then it's going to sink.
