Basic chemistry (formulas): Identify the correct chemical formula for water. Select the scientifically accepted molecular formula of water used in chemistry and everyday science. Choose the correct formula.

Given data

• Ask: Write the chemical formula of water.
• Context: Basic chemistry and everyday science knowledge.

Concept/Approach
A water molecule consists of two hydrogen atoms covalently bonded to one oxygen atom. Its molecular formula is H₂O.

Step-by-step clarification
• H₂O: correct molecular composition (2 H, 1 O). • H₂O₂: hydrogen peroxide (a different compound). • HO: an unrealistically simplified radical notation, not the stable molecule. • H₃O⁺: hydronium ion, present in acidic solutions, not neutral water.

Final Answer
H₂O