Most sulfide compounds of the transition metals are insoluble in water. many of these metal sulfides have striking and characteristic colors by which we can identify them. therefore, in the analysis of mixtures of metal ions, it is very common to precipitate the metal ions by using dihydrogen sulfate (commonly called hydrogen sulfide), h2s. suppose you had a mixture of fe2 , cr3 , and ni2 . complete the net ionic equations for the precipitation of these metal ions by the use of h2s. (type your answers using the format fe2 for fe2 .)

The first element on the periodic table of elements is carbon. a. true b. false

Draw the lewis dot structure for each of the following polyatomic ions

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