Two radioactive nuclides decay by successive first-order processes: (the quantities over the arrows are the half-lives in days). suppose that y is an isotope that is required for medical applications. at what time after x is first formed will y be most abundant?

Hi your question was incomplete because the two half lives were not given, hence I have attached the full version of the question in the  attachment below.

38.9 Days

Explanation:

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.