besides if it was, Low pressure would equal low temp.
It would?
Yes. Low pressure = more clouds = less sunlight = less temp
Low pressure = [usually] closer isobars = more wind = wind chill = less temp
I'm sorry, is that the sound of me being right?
Why would a low density mass of air exert more pressure than a high density mass of air?
I don;t know what the hell you're getting at. I literally just studied meteorology. Everything I just said is correct. Don't make me hear back-pedalling. It's fine to admit defeat sometimes.
Cold air masses are more dense and would thus indicate a higher barometric pressure below this air mass.
Hot air masses are less dense and would thus indicate a lower barometric pressure below this air mass.
You're an idiot.
Temperature and pressure affect density, yes. But High pressure does not necessarily indicate high density. They are independent of each other. I'm not going go copy pasta the entire goddamn chapter on air density for you, because I cbf. Just stop being an idiot and understand air density before you post things that make you look like an idiot.
EDIT: see parsec's link and stop being stupid.
My original "I'm right" still stands.
I still can't believe you think cold air is the cause of high pressure. When's the last time an anticyclone passed over and felt significantly colder than a low-pressure system?