Question

A certain sample of element Z contains 60% of 69^Z & 40% of 71^Z. What is the relative atomic mass of element Z in this sample

Answer 1

We know that Weighted Atomic mass of Element is Calculated based upon their existence of Isotopes and the Relative abundance of these Isotopes.

Given that the Element Z is Composed of :

Isotope                       Relative abundance                   Atomic Mass

⁶⁹X                                        60%                                           69

⁷¹X                                         40%                                           71

Weighted Atomic Mass of Element Z :

= (0.60)(69) + (0.40)(71)

= 41.4 + 28.4

= 69.8

So, The Relative Atomic Mass of Element Z is 69.8

Answer 2

Answer:

Explanation:

The relative atomic mass of element

Z  = 60 × 69 + 40 × 71 /60 + 40  =  69.8  g/mol