What element in period 3 has all 8 valence electrons

In which phase(s) do the molecules take the shape of the container?

How do you convert 4 mmol of bromobenzene to ml?

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.