7. Experiments performed to reveal the structure of atoms led scientists to conclude that an atom's
A) positive charge is evenly distributed
throughout its volume
B) negative charge is mainly concentrated in its
nucleus
4) volume is mainly unoccupied
D) mass is evenly distributed throughout its
volume

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

Calculate the number of moles of ethane in 100 grams

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.