1) Determine which element has the following electron configuration

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 mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6