An unknown gas, D, reacts with fluorine gas to form the compound DF4(g), as represented by the following equation. D(g)+2 F2(g)→DF4(g) A series of experimental trials were performed at 600∘C to determine the rate law expression for the reaction. Data from the trials are shown below.(a) A student claims that the reaction is first order with respect to F2(g). Do you agree or disagree? Justify your answer using the data above.(b) What is the initial rate of disappearance of F2(g) in trial 3? Justify your answer(c) A student claims that if element D is in group 18, then the molecular geometry of DF4(g) is square planar. Do you agree or disagree with the student? Justify your answer in terms of VSEPR theory.

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give