Answer Happy

Problems B 1 Calculate the isotope ratios and concentrations of Nd and Sr in a mixture of two components A and B containing 75% by weight of component B. The composition of the end members are: 143Nd/144Na А 0.5130 10 Nd, ppm 0.5108 32 0.7180 250 87Sr/Sr 0.7038 120 Sr, ppm unknown components and calculate the value of the curvature coefficient K. (2) 143Nd/144Nd Nd, ppm 2 Using the isotopic compositions and concentra- tions of Nd and Sr for components A and B given in Problem 1, plot a mixing hyperbola in coordi- nates of 43Nd/144Nd and s7Sr/Sr by calculating the coordinates of points for increments of 0.2 of the mixing parameter f. 3 Derive the mixing equation that fits two sam- ples (1) and (2) that are different mixtures of two (1) 0.5120 25 0.7400 200 0.5132 20 0.7040 350 87Sr/6Sr Sr, ppm Note: we used r instead of K in our class.