1) The occurrence of high-heat flows at the ridge center provides evidence of the A) destruction of the continental crust
B) destruction of the oceanic crust
C) existence of rising mantle convection currents
D) existence of ancestral mountains

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.