I'm just gonna clarify the other person's answer a big more. It is the rock. The rock is denser than the car, so that means it must have a larger mass, since density is mass divided by volume. And if it's large, it has a big volume as well
A student was comparing two samples with an equal number of carbon atoms. One sample contained only Carbon-12 atoms. One sample contained only Carbon-14 atoms, which contain two more neutrons than Carbon-12 atoms. The student measured the mass of each sample and testing the reactivity of each sample.
Required:
What would best describe the results of the investigation?