How many atoms of hydrogen (H) are present in 200 molecules of ammonia (NH_3)?

• A. 400
• B. 600
• C. 3,600
• D. 200

Answer: (B)

Verified step by step guidance

1. Identify the chemical formula of ammonia, which is \(\mathrm{NH_3}\). This means each molecule of ammonia contains 3 hydrogen atoms.
2. Determine the number of ammonia molecules given, which is 200 molecules.
3. Calculate the total number of hydrogen atoms by multiplying the number of molecules by the number of hydrogen atoms per molecule: \$200 \times 3$.
4. Express the calculation as \(\text{Number of hydrogen atoms} = 200 \times 3\).
5. The result from this multiplication will give the total number of hydrogen atoms in 200 molecules of ammonia.