he standard enthalpy of formation of acetic acid, carbon dioxide, water are 491.6kJ/mol, -285.8 kj/mol, -393.5kJ/mol respectively. calculate the standar enthalpy of combustion of acetic acid.

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

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.

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon