Urea is commonly used in fertilizers and as a nitrogen source in agriculture, and its molecular formula is essential for identifying its chemical structure.
Urea is an organic compound with the molecular formula \( NH_2CONH_2 \). It consists of two amine groups (\( NH_2 \)) attached to a carbonyl group (\( C = O \)).
The correct molecular formula for urea is \( NH_2CONH_2 \), making D the correct answer.