Calcium chloride contains only calcium and chloride. what is the formula for this compound? (you will need the periodic table for this question to determine the groups of these elements and, thus, determine their ionization. you might also choose to access the video for the periodic table of the elements in the introduction to this question.) express your answer as a chemical formula.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

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.

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?