4. (08.02 LC)
Which statement is correct about molarity and volume?

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

What is the subscript for oxygen in its molecular formula

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.