2.56 grams of manganese how much in cm³?

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

Define dew point. i am writing this part to be able to ask the question