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What is the valence electron of Lead "Pb"

Now molecules: molecules of H2 + molecules of O2 → molecules of H2O

How can you explain the arrangement of the electromagnetic spectrum?

An element that is liquid at room temperature but gas at 100 degrees

Compare and contrast chemical change and physical change.

Can 5 minutes of hard sex be better then 30 minutes of work

If, at a given temperature, the equilibrium constant for the reaction H2 (g) Cl2 (g) 2HCl (g) is Kp, then the equilibrium constant for the reaction HCl (g) (1/2) H2 (g) (1/2) Cl2 (g) can be represented as:

The tank of an air compressor contains gas at normal atmospheric pressure (1atm). If the compressor motor pumps the equivalent of three extra tanks of air into the compressor tank, what will be the final pressure

Which atom has the largest number of neutrons? phosphorus-30 chlorine-37 potassium-39 argon-40 calcium-40?

A certain indicator has a color chart that shows that when the indicator is yellow, the solution is acidic. What is true about a solution that produces a yellow indicator?