Anyone knows how to solve this question?
Thanks
Relative atomic mass?
回答 (1)
2020-09-14 11:30 pm
✔ 最佳答案
Let y% be the percent abundance of ³⁰Si.Then, the percent abundance of ²⁹Si = (100 - 92.2 - y)% = (7.8 - y)%
Relative atomic mass of Si:
28.0 × 92.2% + 29.0 × (7.8 - y)% + 30.0 × y% = 28.09
2581.6 + 226.2 - 29.0y + 30.0y = 2809
y = 1.2
Hence, the percent abundance of ³⁰Si = 1.2%
收錄日期: 2021-04-24 07:58:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200914151638AAW2yrN