# Project Of Christopher Boo

Chemistry Level 1

There are two rubidium isotopes occurring in nature: $$\text{Rb}^{85}$$, which has a molar mass of $$84.91$$, and $$\text{Rb}^{87}$$, whose molar mass is $$86.92$$. The atomic mass of rubidium is $$85.47$$. What is the percentage of $$\text{Rb}^{87}$$ out of the total existing $$\text{Rb}?$$

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