2. A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013 disintegrations per 20 min. a. What percentage of the nuclide will have decayed after 200 days

What type of reaction is zn + cucl2 → cu + zncl2?

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

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.