Question

Find the average atomic mass of a sample that has 75%

Element-133, 20% Element-132 and 5% Element-134.

Answer 1

Average atomic mass: 132.85a. m. u.

Step-by-step explanation:

The average atomic mass could be found by:

Average mass = ∑ (Abundance percentage × isotope mass)

⇒ Average mass = (0.75 × 133) + (0.20 × 132) + (0.05 × 134) = 132.85a. m. u.

Hope this helps! :)