7. Radium is a radioactive element that decays into radon gas. Its atomic mass
is 226. How many moles in 500 grams of radium?

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.