What is the atomic mass of iridium?

Iridium has two isotopes. Iridium-191 has a mass of 191.0 amu and a percent abundance of 37.58%. Iridium-193 has a mass of 193.0 amu and a percent abundance of 62.42%.

Answer 1

Well, you take the weighted average of the individual isotopes....

#"Atomic mass of Ir"-={37.58%xx(191)+62.42%xx(193)}*"amu"#

#=192.25*"amu"#.

Being a third row metal, iridium is fairly kinetically inert, and occasionally you can see a reaction taking place in real time. Chemists who work with it gather all of their residues and ship it back to the companies who initially lent them the salts. Iridium is a very valuable metal—nearly as valuable as gold.

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Answer 2

Serenity Allen

The atomic mass of iridium is approximately 192.22 atomic mass units.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.