Al (26.98 amps) has a ymk structure and an atomic radius of 143.2 pm. Calculate a) the unit cell size (edge length), b) the density of Al metal.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Draw the lewis dot structure for each of the following polyatomic ions

Which statement best describes what happens when molecular compounds melt