An interplanetary expedition uncovered the remnants of an ancient civilization on Mars. They discovered two spherical objects made from previously unknown elements. The Martians had named one element Altrium, density 5.62 g/cm3, and the other element Hypotrium, density 2.77 g/cm3. Each sphere was exactly 10.00 cm in diameter. What was the difference in masses of the two spheres in grams? Volume of a sphere = (4/3)πr3. π = 3.1416.

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.