12088auri
contestada

Oxygen has three naturally occurring isotopes in the following proportions oxygen 16,99.762%(15.994 91 u); oxygen 17, 0.038000% (16.999 13 u); oxygen 18, 0.20000%(17.999 16 u). What is the average atomic mass of oxygen?

Respuesta :

20plant

The average atomic mass is 15.9993

Why?

Take the percentage and times it by the amu and then add all the new numbers together to get the average atomic mass:

(0.99762 x 15.99491) + (0.00038 x 16.99913) + (0.002 x 17.9916) = 15.9993

The statement of average atomic mass of oxygen is "16 u."

What is an average atomic mass?

An element's average atomic mass is the sum of its isotope masses multiplied by its natural abundance. The average atomic mass takes isotopic abundance into account (relative to each other found in the Earth).

Divide the proportion into decimal form by 100, then multiply by the supplied atomic mass and add to get the average atomic mass.

Average atomic mass

= (0.99762 x 15.99491 u) + (0.00038 x 16.99913 u) + (0.002 x 17.9916 u)

= 15.9993 u

≈ 16 u

Hence the correct option is 16 u.

Learn more about average atomic mass here

https://brainly.com/question/13753702

#SPJ2

Otras preguntas