Give the noble gas configuration for an iron ion with a +3 charge. [Ar] 4d5
[Ar] 3d5
[Ar] 4s2, 3d3
[Ar] 4s2, 3d9

What is the ph of a solution with a concentration of 5.2 × 10–8 m h3o+?

The most efficient way to establish the best possible economizer position is to measure

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead