The question is asking to choose among the following choices that states an example of how the scientist might use a model and base on my investigation, I would say that the answer would be letter <span> d. the end of a slinky is moved vertically up and down to simulate a wave. I hope you are satisfied with my answer and feel free to ask for more</span>
Answer:
Average atomic mass of X is 10.2 amu.
Explanation:
Given data:
Percentage abundance of X-10 = 80%
Percentage abundance of X-11 = 20%
Average atomic mass of X = ?
Solution:
Average atomic mass of X = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass of \X = (80×10)+(20×11) /100
Average atomic mass of X = 800 + 220 / 100
Average atomic mass of \X = 1020 / 100
Average atomic mass of X = 10.2 amu
A dull......................