Which of the following is a valid mole ratio from the balanced equation 2Fe203 + 3C

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

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins