AdSense doesn't disclose how much you will get paid. Essentially, each list of text ads is an auction. The highest earning ads are shown and if someone clicks on them, you will earn some money. The rates very from a few cents to many dollars depending on how high the auction is.
For example, health, finance tend to have higher prices while entertainment and books are among the lowest.
The best thing to do is to measure what Google pays you by running a test. If you don't like the rates, you can turn it off, if you do, you can dial up or down the amount of ad inventory you send them. But, no matter what, you won't know what they will pay you exactly until after the ad has been clicked and reported.