Calculate the average atomic mass of rubidium. rubidium has two isotopes, 85rb and 87rb. 85rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17%. 87rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. show your work.

Hey there!

85.468

( 84.912 x 0.7217 = 61.281 ) And the way we got this is by understanding that the atomic mass of rubidium is practically in charge here. And then, we multiply it by the abundance, or the average.

Then, from 61.281, we than do the following: 61.281 + 24.187 = 85.468. Just as the question listed, we would then have to add both of these amu together. That therefore get our answer.

85.468

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.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.