Rhenium (Re) is made up of 37.4% 185Re and 62.6% 187Re
The atomic mass of 185Re is 184.953 amu. The atomic mass of 187Re is 186.956 amu
What is the average atomic mass of rhenium?

Question

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Respuesta :

Neetoo Neetoo · Answer 1 · 2019-10-24T09:22:17+02:00

Answer:

Average atomic mass of Rhenium = 186.207 amu.

Explanation:

Given data:

Abundance of R¹⁸⁵ = 37.4%

Abundance of R¹⁸⁷ = 62.6%

Atomic mass of R¹⁸⁵ = 184 .953 amu

Atomic mass of R¹⁸⁷ = 186.956 amu

Average atomic mass = ?

Solution:

Average atomic mass of Rhenium = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100

Average atomic mass of Rhenium = (184 .953×37.4)+(186.956×62.6) /100

Average atomic mass of Rhenium = 6917.2422 + 11703.4456 / 100

Average atomic mass of Rhenium = 18620.6878 / 100

Average atomic mass of Rhenium = 186.207 amu.

Scrublord Scrublord · Answer 2 · 2019-10-24T19:55:38+02:00

Average atomic mass of Rhenium = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100

Average atomic mass of Rhenium = (184 .953×37.4)+(186.956×62.6) /100

Average atomic mass of Rhenium = 6917.2422 + 11703.4456 / 100

Average atomic mass of Rhenium = 18620.6878 / 100

Average atomic mass of Rhenium = 186.207 amu.

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