How many Liters of fluorine are required to produce 290,8 g of
Eobalt(II) fluoride?

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

Which element would mostly likely have an electron affinity measuring closest to zero

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?