State the number of atoms of each element, present in

(a) C₆H₁₂O₆

(b) H₂SO₄

(c) HNO₃

(d) CaCO₃

Also name these compounds.

(a) C₆H₁₂O₆ — Glucose

1. Carbon (C): 6 atoms
2. Hydrogen (H): 12 atoms
3. Oxygen (O): 6 atoms

(b) H₂SO₄ — Sulphuric acid

1. Hydrogen (H): 2 atoms
2. Sulfur (S): 1 atom
3. Oxygen (O): 4 atoms

(c) HNO₃ — Nitric acid

1. Hydrogen (H): 1 atom
2. Nitrogen (N): 1 atom
3. Oxygen (O): 3 atoms

(d) CaCO₃ — Calcium carbonate

1. Calcium (Ca): 1 atom
2. Carbon (C): 1 atom
3. Oxygen (O): 3 atoms