There were two rainstorms in Sinan last month. Before Storm 1, the air temperature at the surface was 21°C. Before Storm 2, the air temperature at the surface was 29°C. The temperature of areas surrounding Sinan was the same before both storms. There
was the same amount of water vapor in the air parcels before both storms.

What is the formula of the ionic compound composed of calcium cations and chloride anions

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

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?