((6 mol)(-393.5 kJ/mol) + (6mol)-(285.83 kJ/mol)) - (1 mol) - (1,273.02 kJ/mol)

it have destructive character

yes

explanation:

search chemistry final b exam in google and a site called quizlet will pop up

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

po-215 i got it right on the quiz