Please help me I need the answer and it’s due almost due I can’t fail

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Which terms are used to identify pure substances

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood