An element is said to be enriched with respect to a particular isotope if it has an unnaturally large abundance of that isotope. consider a sample of cl2 that is enriched with 35ci 35c1 mass = 34.97 amu abundance = 85.00 % 37c1 mass = 36.97 amu abundance = 15.00 % (a) calculate the atomic weight of the enriched cl (b) how many cl2 molecules are in a 0.345 g sample of the enriched chlorine?

(a) Atomic Mass = 35.24

(b) 2.95x10²¹ Cl₂ molecules

Explanation:

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(a) We calculate the atomic weight of the enriched Cl using the abundances and masses of the isotopes:

(b) We use the previously calculated atomic mass and use it as molar mass (35.24 g/mol), alongside Avogadro's number:

explanation:

0.07 g/cm³

1.37 g/cm³