The planet Gallifrey has two naturally occurring isotopes of chlorine. Chlorine-35 has an isotopic abundance of 45.89% and a mass of 34.9689 amu. Chlorine-37 has an isotopic abundance of 54.11% and a mass of 36.9659 amu.
Calculate the average atomic mass of chlorine on planet Gallifrey.

36.05 amu

Explanation:

Given data

Isotope       Mass (m)               Abundance (ab)

³⁵Cl              34.9689 amu        45.89% (0.4589)

³⁷Cl              36.9659 amu        54.11% (0.5411)

We can calculate the average atomic mass (am) of chlorine on planet Gallifrey using the following expression.

am = ∑ mi × abi

am = 34.9689 amu × 0.4589 + 36.9659 amu × 0.5411

am = 36.05 amu

idk

explanation: