2006-12-31 06:47:17 · 21 answers · asked by maulipatel96 2 in Science & Mathematics ➔ Physics
Water (molecule)
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"H2O" redirects here. For other uses, see H2O (disambiguation).
This article describes water from a scientific and technical perspective. See Water for its importance for life and humanity, and Water (disambiguation) for other uses.
Water (H2O)
The water molecule has this basic geometric structureWater molecules have this structure.
General
Systematic name Water
Other names Aqua
Hydrogen oxide
Dihydrogen monoxide
Hydrogen hydroxide
Oxidane
Molecular formula H2O
Molar mass 18.0153 g/mol
Appearance transparent, almost
colorless liquid with
a slight hint of blue[1]
CAS number [7732-18-5]
see also Water (data page)
Properties
Density and phase 1000 kg/m3, liquid
917 kg/m3, solid
Melting point 0 °C, 32 °F (273.15 K)
Boiling point 100 °C, 212 °F (373.15 K)
Triple point 273.16 K, 611.73 Pa
Specific heat
capacity (gas) cp= 1850 J/(kg·K)
cv= 3724 J/(kg.K)
Specific heat
capacity (liquid) 4186 J/(kg·K)
Specific heat
capacity (solid) 2060 J/(kg·K)
Acidity (pKa) 15.74
Basicity (pKb) 15.74
Viscosity 0.001 Pa·s at 20 °C
Surface Tension at 20 °C 7.28 N/m
Structure
Molecular shape non-linear bent
Crystal structure Hexagonal
See ice
Dipole moment 1.85 D
Hazards
MSDS External MSDS
Main hazards No known hazard
NFPA 704
0
0
0
RTECS number ZC0110000
Supplementary data page
Structure and
properties n, εr, etc.
Thermodynamic
data Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Related solvents acetone
methanol
Related compounds water vapor
ice
heavy water
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references
Water (H2O, HOH) is the most abundant molecule on Earth's surface, composing 70-75% of the Earth's surface as liquid and solid state in addition to being found in the atmosphere as a vapor. It is in dynamic equilibrium between the liquid and vapor states at standard temperature and pressure. At room temperature, it is a nearly colorless, tasteless, and an odorless liquid. Many substances dissolve in water and it is commonly referred to as the universal solvent; because of this, water in nature and in use is rarely clean, and may have some properties different than those in the laboratory. However, there are many compounds that are essentially, if not completely, insoluble in water. Water is the only common, pure substance found naturally in all three states of matter—for other substances, see Chemical properties.
2006-12-31 06:54:55 · answer #1 · answered by Anonymous · 0⤊ 2⤋
H20 means that molecule of water is contain of 2 atoms of hydrogen and one atom of oxygen.
2014-11-11 22:47:35 · answer #2 · answered by Anonymous · 0⤊ 0⤋
That Means water. H20.
The H stands for hydrogen [since there is no number in front of it, there is only 1 hydrogen molecule.] and the O stands for Oxygen [and since there is the #2 in front of it, that means there are 2 Oxygen molecules.]
Hope that helps!! :]
...Wait is it the other way around?!? I kinda forgot..sorry
2006-12-31 14:56:33 · answer #3 · answered by jgbaek 4 · 0⤊ 0⤋
Its the chemical formula for water.
The H represents hydrogen
The O represents oxygen
The 2 after the H is called the subscript, it tells the ratio of an element to another, in this case water to hydrogen which would be one oxygen atom to two hydrogen atoms.
2007-01-01 00:03:20 · answer #4 · answered by symperl 2 · 0⤊ 0⤋
H2o stands for Hydrogen 2 Oxygen. There are 2 Oxygen molecules and one Hydrogen, creating Water. But it takes many H2o molecules to create just a drop of water.
2006-12-31 15:00:47 · answer #5 · answered by Classic Team 2 · 0⤊ 1⤋
Water. H is the chemical symbol for hydrogen, and the subscript 2 means that there are two hydrogens. O is the chemical symbol for oxygen, and since there is no subscript, that means there is one oxygen.
When you put 2 hydrogen atoms and one oxygen atom together, the result is a molecule of water.
2006-12-31 14:50:42 · answer #6 · answered by Anonymous · 1⤊ 2⤋
Water.
2006-12-31 14:54:50 · answer #7 · answered by ?{Kassie}? 2 · 1⤊ 1⤋
Water, two atoms r hydrogen and one atom of oxygen.
H=Hydrogen
the 2 means there's two
O=Oxygen
2006-12-31 16:02:03 · answer #8 · answered by surfergrrl101 3 · 0⤊ 1⤋
Water.
2006-12-31 14:48:50 · answer #9 · answered by Midnight Train 5 · 2⤊ 2⤋
Do you mean "h two oh" like the formula for water?
h2 means two hydrogen atoms and the "oh" = O is for Oxygen.
The water molecule is made of two hydrogen atoms and one oxygen atom.
2006-12-31 14:51:06 · answer #10 · answered by CAM1122 3 · 0⤊ 2⤋