niline, a starting compound for urethane plastic foams, consists of C, H, and N. Combustion of such compounds yields CO2 (carbon dioxide), H2O (water), and N2 as products. If the combustion of 9.71 mg of aniline yields 6.63 mg of H2O and 1.46 mg of N2, what is its empirical formula

What is the work done by the electric force to move a 1 c charge from a to b?

How many moles are in 7.2 x 10^23 carbon molecules?

The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e.g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?