Which type of rock is Most likely to form because of high heat and pressure

Achemical reaction is done in the setup shown , resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?

Ajar is tightly sealed at 22°c and 772 torr what is the pressure inside a jar after its been heated to 178°c

Hydrogen has three isotopes 1h, 2h, and 3h. what is the difference between these three isotopes?