What is the simplified empirical formula for this molecular formula S20g

What forms when chemical reactions combine pollution with sunlight?

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?