Consider the two electron arrangements for neutral atoms a and b. which atom is more stable?
a - 1s2, 2s2, 2p6, 3s1
b - 1s2, 2s2, 2p6, 5s1
a
b
indeterminate

How many moles are contained in 5.6 l of h2 at stp

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.

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol