The average molar mass of chlorine is . The ratio of to in naturally occurring chlorine is close to:

Question

The average molar mass of chlorine is . The ratio of  to  in naturally occurring chlorine is close to:

Canvas Classes · Accepted Answer

Strategy:
 Average atomic mass is the weighted average of isotopic masses. We set up an algebraic equation where the total mass is the sum of (mass  abundance) for each isotope, and solve for the relative ratio.

Step 1: Set up the equation
Let abundance ratio be  for  and .

Step 2: Solve algebraically

Step 3: Conclusion
The ratio is .

More questions from Some Basic Concepts of Chemistry (Mole Concept)