The density of osmium, which is the densest metal, is 22.57 g/cm3. What is the mass in kg of a block of osmium that measures 1.00 cm x 4.00 cm x 2.50 cm?

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Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?