Answer to Question #63029 in General Chemistry for James

Question

A made up element Q has an average atomic mass of 43.6534 and it has four stable isotopes: Q-40 (actual mass = 39.963), Q-42 (actual mass = 41.950), Q-43 (actual mass = 42.982) and Q-45 (actual mass = 44.953). Q-40 makes up 11.53% of the element. Of the remaining three isotopes, one is precisely twice as abundant as one of the others. What are the abundances of all four isotopes?