Why does every sample of water have the same boiling point?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Connect the whole numbers on the periodic table to indicate what they represent?

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.