Question

Problem 1. Assume that Mars formed from chemical elements that were able to freeze out of the cloud of gas around the forming Sun, and that the relative abundances in this frozen-out material was the same as that of solar atmosphere (see belowTable) for Mg, Si, Fe, Na, Al, and Ca. Assume that all elements except perhaps Fe are fully oxidized when they freeze out (as MgO, SiO2, FeO, Na20, Al20s, and CaO). Calculate and tabulate the fractions of the total mass of Mars which are accounted for by O, Na, Mg, Al, Si, S, Ca, and Fe under each of the following three plausible hypotheses (the range of answers will give you some idea of the uncertainty of such calculations). (a) No S is accreted, and the Fe is entirely metallic, as in the Earth's core (that is, it brings with it no O). (b)No S is accreted, but the Fe is fully oxidized as FeO, so that there is no metallic core in the planet. (c) The S is fully frozen out in the relative amount given in the table below, combined with Fe as FeS; the remaining Fe is oxidized as Feo H, He, C, N, Ne, Ar (which do not condense at high temperatures), and all elements less abundant than sodium (which contribute little to the total). In your answer, please tabulate the mass fractions for each element, not the mass fractions of various oxides

Answer 1

Composision is very likely same as sun's surface Density pressure is low enough so heat molecular gas(H_2 O) would become solid as gas cools as gas cools ions of compounds Na^+ . al^+, cl^+ form grams metals such ass fed Ni fluidly. O = 99.7621 Na = 100 Mg = 78.99 Al = 100 si = 92.9297 s = 94.93 ca = 96.941 Fe = 2.119