3. how many atoms of hydrogen are in a molecule of penicillin g, c17h20o4s? a. 4 b. 42 c. 20 d. 17
3. how many atoms of hydrogen are in a molecule of penicillin g, c17h20o4s? a. 4 b. 42 c. 20 d. 17
Answer
Explanation:
Step1: Analyze the chemical formula
The chemical formula of penicillin G is $C_{17}H_{20}O_{4}S$. The sub - script next to the symbol of an element in a chemical formula indicates the number of atoms of that element in one molecule of the compound.
Step2: Identify the number of hydrogen atoms
For hydrogen ($H$), the sub - script is 20. So, there are 20 hydrogen atoms in a molecule of penicillin G.
Answer:
C. 20