Answer to Question #102043 in Chemistry for fawas

Question

Classify the following substance as an element, compound and mixture :

sand

urea

air

urine

Answer 1

Sand is a mixture of fine mineral and rock particles.

Urea is an organic compound (another name carbamide) consisting of two amine groups attached to one carbonyl group (NH₂-CO-NH₂).

Air is a mixture of gases including nitrogen, oxygen, argon, carbon dioxide and other gaseous substances (i.e., water vapor).

Urine is a mixture of organic compounds comprising metabolic waste products, in particular, urea, uric acid, creatinine, and ions (chloride, potassium, sodium, etc.)