Describe the difference between atoms, molecules and compunds please help

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

What is the molar mass of a gas that has density of 2.054 g/l

Displacement is the slope of a velocity vs. time graph a. true b. false