Claim: Water is a liquid with the chemical formula H2O.
Evidence: Its chemical formula is H2O , meaning that its molecule contains one oxygen and two hydrogen atoms , that are connected by covalent bonds.
Water strictly refers to the liquid state of that substance , that prevails at standard ambient temperature and pressure ; but it often refers also to its solid state -LRB- ice -RRB- or its gaseous state -LRB- steam or water vapor -RRB-.