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 of ^63Cu is 62.93000amu. The mass of 65^Cu is 64.9200amu. Express your answer to two decimal places, and included the appropriate units. Value Units The astronaut then measures the abundance of strontium on the new planet, obtaining the following results: Isotope Abundance Mass (amu) ^86Sr 9.46 85.91 ^87Sr 7.00 86.91 ^88 Sr 83.54 87.91 What is the atomic mass of strontium for this planet? Express your answer to two decimal places, and included the appropriate units.

Explanation / Answer

Average molecular mass= ?xiMi

Part A.

Mass of Cu=0.6997*62.9300+0.3103*64.9200

                                =64.1768 amu

PartB,

Mass of Sr=0.0946*85.91+0.0700*86.91+0.8354*87.91

                =87.6508 amu

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

---

---

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