Which molecule contains ten hydrogen atoms

the answer is hydrocarbons contain 10 hydrogen atoms : D

Butane

Step-by-step explanation:

Butane is an alkane.

The general formula for an alkane is CₙH₂ₙ₊₂.

Butane has four carbon toms, so its formula is C₄H₁₀.

Propane is wrong. It has three carbon atoms, so its formula is C₃H₈.

Butene is wrong. The general formula for an alkene is CₙH₂ₙ, so the formula is C₄H₈.

Propene is wrong. It has three carbon atoms, so its formula is C₃H₆.