How many moles of oxygen (o2) are required to completely react with 27.4 mol of h2?

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?