0
1 ATM = 101325 Pascals
1 Pascal = 1/101325 ATM
101.3 kPa = 1 ATM
760 mm Hg = 1 atm therefore there are 1/760 atmospheres in 1 mm Hg.
Decreasing the pressure of a gas will increase its volume -- C
The average value, at sea level, is 101,325 pascals.