A student is given a sample of unknown substance. He is asked to determine if it is classified as a metal, a metalloid, or a non-metal. He discovered that the unknown element conducted some heat and electricity, had a shiny surface, and broke easily. This element is most likely a

Metal

Non-metal

Metalloid

Cannot be determined

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.