On a mission to a newly discovered planet, an astronaut finds copper abundances

Question

On a mission to a newly discovered planet, an astronaut finds copper abundances of 69.97% for 63Cu and 31.03% for 65Cu. What is the atomic mass of copper for this location? The mass of63Cu is 62.9300amu . The mass of65Cu is 64.9200amu . Express your answer to two decimal places, and include the appropriate units. Hints My Answers Give Up Review Part The astronaut then measures the abundance of strontium on the new planet, obtaining the following results: Isotope Abundance (%) Mass (amu) 86 Sr 9.46 85.91 87 Sr 7.00 86.91 88 Sr 83.54 87.91 Submit What is the atomic mass of strontium for this planet? Express your answer to two decimal places, and include the appropriate units.

Explanation / Answer

a)
atomic mass= 0.6997*62.93+0.3103*64.92
                = 64.18 amu

b)
atomic mass= 0.0946*85.91 + 0.07*86.91 +0.8354*87.91
              =87.65 amu

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

---

---

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