1. 1. Zinc has five naturally occurring isotopes: 48.63% of 64Zn, with an atomic

Question

1. 1. Zinc has five naturally occurring isotopes: 48.63% of 64Zn, with an atomic weight of 63.929 amu; 27.90% of 66Zn, with an atomic weight of 65.926 amu; 4.10% of 67Zn, with an atomic weight of 66.927 amu; 18.75% of 68Zn, with an atomic weight of 67.925 amu; and 0.62% of 70Zn, with an atomic weight of 69.925 amu. Calculate the average atomic weight of Zn. 1. 1. Zinc has five naturally occurring isotopes: 48.63% of 64Zn, with an atomic weight of 63.929 amu; 27.90% of 66Zn, with an atomic weight of 65.926 amu; 4.10% of 67Zn, with an atomic weight of 66.927 amu; 18.75% of 68Zn, with an atomic weight of 67.925 amu; and 0.62% of 70Zn, with an atomic weight of 69.925 amu. Calculate the average atomic weight of Zn. 1. 1. Zinc has five naturally occurring isotopes: 48.63% of 64Zn, with an atomic weight of 63.929 amu; 27.90% of 66Zn, with an atomic weight of 65.926 amu; 4.10% of 67Zn, with an atomic weight of 66.927 amu; 18.75% of 68Zn, with an atomic weight of 67.925 amu; and 0.62% of 70Zn, with an atomic weight of 69.925 amu. Calculate the average atomic weight of Zn.

Explanation / Answer

MW avg = sum of ( Xi*MWi)

then

MW avg = 0.4863*63.929 +0.279*65.926 + 0.041*66.927 + 0.1875*67.925 + 0.0062*69.925

MW avg = 65.3955062 amu

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.