Chlorine consists of 75% of the isotope $^{35} ext{Cl}$ and 25% of $^{37} ext{Cl}$. Calculate its relative atomic mass.

Question

Chlorine consists of 75% of the isotope $^{35}	ext{Cl}$ and 25% of $^{37}	ext{Cl}$. Calculate its relative atomic mass.

Accepted Answer

35.5. Relative atomic mass $= \dfrac{(75 	imes 35) + (25 	imes 37)}{100} = \dfrac{2625 + 925}{100} = 35.5$. Taking a simple average of 35 and 37 gives 36, which ignores the abundances.

Answer

A) 35.0

Answer

B) 36.5

Answer

C) 35.5

Answer

D) 36.0

Chlorine consists of 75% of the isotope $^{35}\text{Cl}$ and 25% of $^{37}\text{Cl}$. Calculate its relative atomic mass.

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