Question

Uranium has three common isotopes 234u 235u and 238u. 234u isotope has an atomic mass of 234.0409 amu and an abundance of .00541. 235u isotope has an atomic mass of 235.0439 amu and an abundance of .7204%. 238u isotope has an atomic mass of 238.0508 amu and an abundance of 99.2742%. What is the average atomic mass of uranium

Answer 1

The average atomic mass of uranium is approximately 238.02891 amu.

Step-by-step explanation:

The average atomic mass of uranium can be calculated by multiplying the atomic mass of each isotope by its abundance and then adding the results together.

For uranium, we have three common isotopes: 234U, 235U, and 238U.

The atomic mass of 234U is 234.0409 amu with an abundance of 0.00541, the atomic mass of 235U is 235.0439 amu with an abundance of 0.7204%, and the atomic mass of 238U is 238.0508 amu with an abundance of 99.2742%. Using these values, we can calculate the average atomic mass of uranium:

(234.0409 amu * 0.00541) + (235.0439 amu * 0.7204%) + (238.0508 amu * 99.2742%) = 238.02891 amu

Therefore, the average atomic mass of uranium is approximately 238.02891 amu.