Significant Figures are indicated, but always carry more digits and only round at the end. Reading: IMT Chapter I 1. Copper naturally occurs in two major isotopes, 65Cu and 63Cu. What is the number of moles of 63Cu65Cu6, 63Cu2 and 65Cu2 you cxpect at equilibrium if you start with 1.75 moles of 65Cu2 and 0.50 moles of 63Cu2 ? Final molar quantities should be given with three significant digits. 2. Starting with the most probable distribution found in \#1, what is the new most probable distribution if (a) 0.75mol of 63Cu2 is added (to three significant figures)? (b) 1.75mol of 63Cu65Cu is added (to three significant figures)? Note: Question 42 deals with shifts in equilibrium states (covered in Chemistry 111 from an alternate point-of-view), so you should be able to rationalize in your mind why the composition of the most probable distribution from 41 changes as it does upon the "perturbations" described in (a) and (b). 3. Hydrogen/Deuterium exchange occurs when 2.000mol of H2O,1.000molofD2O and 2.000mol of HDO are mixed. Determine the amounts of these three compounds expected in the most probable distribution (to four significant digits). [The oxygen atoms are not exchanging, and therefore do not need to be included in your tallies of exchanging atoms.] 4. The abundances of oxygen on planet Earth are 16O(99.757%),17O(0.0380%) and 18O(0.205%). If you encounter 2 moles of oxygen gas (O2) on planet Earth, composed of 4 moles of O atoms on the basis of their natural abundances, what is the most probable distribution of O2 molecules among the six different possibilities? Express each of your final molar quantities with four significant figures