Calculate the atomic mass (average) of chlorine using the following data:

% Natural Abundance Molar Mass

³⁵Cl 75.77 34.9689

³⁷Cl 24.23 36.9659

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Solution

The average atomic mass of chlorine

= 26.4959 + 8.9568

= 35.4527 u

The average atomic mass of chlorine = 35.4527 u

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145

Similar questions

Use the data given in the following table to calculate the molar mass of naturally occurring argon isotopes:

^{24} M g

^{25} M g

^{26} M g

\begin{matrix} Isotope & Atomic Mass & Isotopic abundance^{24} M g & 23.98504 & 78.70 %^{25} M g & 24.98584 & 10.13 %^{26} M g & 25.98259 & 11.17 % \end{matrix}

_{17}^{35} Cl

_{17}^{37} Cl

\begin{matrix} S.No & Isotopes & Percentage abundance (%) 1 & _{17}^{35} Cl & 75 2 & _{17}^{37} Cl & 25 \end{matrix}

\begin{matrix} I s o t o p e & p e r N a t u r a l a b u n d a n c e & M o l a r m a s s^{1} H & 99.985 & 1^{2} H & 0.015 & 2 \end{matrix}

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