How many nearest neighbors does each silicon atom have in solid si?

What type of electromagnetic radiation has a shorter wavelength than blue light

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

Ajar contains a certain substance. which observation would show that the substance must be either a solid or a liquid?