Which rule or principle is being broken here?3

1s2 2s2 2p5 3s2

the school  broke principle his own school rules

Explanation: also

Monster (ayy)

You get in my way, I'ma feed you to the monster (yeah)

I'm normal during the day, but at night, turn to a monster (yeah)

When the moon shines like Ice Road Truckers

I look like a villain outta those blockbusters

Godzilla, fire spitter, monster

Blood on the dance floor, and on the Louis V carpet

Fire, Godzilla, fire, monster

Blood on the dance floor, and on the Louis V carpet

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

the product of the pressure and volume is also constant