Final answer:
A molecule of sulfuric acid (H2SO4) contains a total of 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms, which sums up to 7 atoms.
Step-by-step explanation:
The chemical formula for sulfuric acid is H2SO4, which tells us the number of each kind of atom in a molecule. To find the total number of atoms in a molecule of sulfuric acid, we count the atoms of each element presented in the formula: there are 2 hydrogen (H) atoms, 1 sulfur (S) atom, and 4 oxygen (O) atoms. Adding these together, 2 (H) + 1 (S) + 4 (O) equals 7 atoms in total. Therefore, the correct answer is B. 7.