Final answer:
The number of hydrogen atoms in 50 molecules of C₄H₄S₂ is calculated by multiplying the number of hydrogen atoms in one molecule by the number of molecules, which is 200 hydrogen atoms.
Step-by-step explanation:
To determine how many hydrogen atoms are in 50 molecules of C₄H₄S₂, we must do a simple multiplication. Each molecule of C₄H₄S₂ contains 4 hydrogen atoms. Therefore, if one molecule has 4 hydrogen atoms, 50 molecules will have 50 times as many hydrogen atoms.
Calculating this gives us: 4 hydrogen atoms/molecule × 50 molecules = 200 hydrogen atoms.
So, the correct answer is a) 200 hydrogen atoms in 50 molecules of C₄H₄S₂.