How does polarity affect solubility?

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

List four observations that indicate that a chemical reaction may be taking place