150.0 grams of an isotope with a half-life of 36.0 hours is present at time zero. How long will it take to decay to 18.75g?

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

What is the mass of 8 moles of sodium atoms

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.