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Furkat [3]
3 years ago
12

The element lead (Pb) consists of four naturally occurring isotopes with atomic masses 203.97302,205.97444,206.97587, and 207.97

663 amu. The relative abundances of these four isotopes are 1.4,24.1,22.1, and 52.4 %, respectively. From these data, calculate the atomic weight of lead.
Chemistry
1 answer:
Sphinxa [80]3 years ago
4 0

Answer:

The atomic weight of lead is 207.2169 amu

Explanation:

Step 1: Data given

Lead has 4 isotopes:

⇒ 203.97302 = 1.4 %

⇒ 205.97444 = 24.1 %

⇒ 206.97587 = 22.1 %

⇒ 207.97663 = 52.4 %

Step 2: Calculate the atomic weight of lead

Atomic weight = 203.97302 * 0.014 + 205.97444*0.241 + 206.97587 *0.221 + 207.97663 * 0.524

Atomic weight = 207.21688371  ≈ 207.2169 amu

The atomic weight of lead is 207.2169 amu

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See figure 1

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