Explain why the limiting reactant may not be used completely to produce the products of a reaction when the percentage yield for a reaction is 70%?

Which statement accurately describes the rock layers? layer 8 is older than layer 1. layer 3 is younger than layer 6. layer 4 and layer 10 are the same relative age. layer 2 and layer 9 are the same relative age.

Which other elements contain the same number of outer electrons as sodium

In 2002, the rare earth elements mine in mountain pass, california was closed because