Answer:
\large \boxed{5}
Explanation:
Molecules of NH₄OH do not exist.
If they did, however, here is how you might answer.
Total H atoms = 39 H
-7H₂O =<u> 14 </u>
H atoms available = 25 H
Each "molecule" of NH₄OH contains five H atoms.

Methane is a tetrahedral molecule where each C-H is kept as far away from the others as possible due to electron-electron repulsion, resulting in a bond angle of 109.5˚ (Technically 109˚ 28' but I would just use the decimal version if I were you).
Hope this helps!
Cobalt-59 and Cobalt-60 differ in that they have different mass number which means they have different number of neutrons. Isotopes are atoms of the same element with similar atomic number but different mass number. Cobalt-60, has a number of uses, which includes, being used to irradiate food sources as a method of preserving food, used in industrial radiography to detect structural flaws in metal parts among other uses.
It provides a way to test a hypothesis
Barometer, it is used to measure air pressure