You're asking about an alkaline molecule with ten carbons, but you haven't specified which alkaline molecule. To answer this, we need more information!

Here's why:

* Alkaline means a molecule with a basic pH. It doesn't tell us the chemical formula.

* Ten carbons gives us the number of carbon atoms, but we need more information about the other atoms in the molecule.

To give you a precise answer, I need to know:

* The specific alkaline molecule you are interested in. For example, is it:

* Sodium hydroxide (NaOH)?

* Potassium carbonate (K2CO3)?

* Another molecule?

* The structure of the molecule. A molecule with ten carbons can have many different arrangements.

Here are some examples to illustrate:

* Decane (C10H22): This is a hydrocarbon with ten carbons and 22 hydrogens.

* Sodium decanoate (C10H19NaO2): This is a soap molecule with ten carbons, 19 hydrogens, one sodium, and two oxygens.

Please provide more details about the specific alkaline molecule you're interested in, and I can calculate the number of hydrogen atoms for you.