Question

based on this mass spectrum, what is the average atomic mass of element q?
32.00 amu
32.07 amu
33.00 amu
33.19 amu

Explanation:

Step1: Calculate the contribution of each isotope

• For mass number \(32\): \(32\times0.948 = 30.336\)
• For mass number \(33\): \(33\times0.0076= 0.2508\)
• For mass number \(34\): \(34\times0.0437 = 1.4858\)

Step2: Sum up the contributions

$$30.336+0.2508 + 1.4858=32.0726\approx32.07$$

Answer:

\(32.07\ \text{amu}\) (Option B)