Elements that have a blank Electronegativity will have low metallic character

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold