Mass Number Of Oxygen

››More information on molar mass and molecular weight. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.
The most common Isotope Mass for Oxygen is 16 Atomic Mass Units.

Oxygen weighs 0.001429 gram per cubic centimeter or 1.429 kilogram per cubic meter, i.e. Density of oxygen is equal to 1.429 kg/m³; at 0°C (32°F or 273.15K) at standard atmospheric pressure. In Imperial or US customary measurement system, the density is equal to 0.08921 pound per cubic foot lb/ft³, or 0.00082601 ounce per cubic inch oz.

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of oxygen is 31.99880 ± 0.00060 g/mol
Compound name is oxygen
Convert between O2 weight and moles

Compound	Moles		Weight, g
O2

Elemental composition of O2

Element	Symbol	Atomic weight	Atoms	Mass percent
Oxygen	O	15.9994	2	100.0000

Mass percent composition

Atomic percent composition

Sample reactions for O2

Equation	Reaction type
C₃H₈ + O₂ = CO₂ + H₂O	combustion
C₂H₆ + O₂ = CO₂ + H₂O	combustion
CH₄ + O₂ = CO₂ + H₂O	combustion
H₂ + O₂ = H₂O	synthesis
C₈H₁₈ + O₂ = CO₂ + H₂O	combustion

Formula in Hill system is O2

Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:

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Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, water, nitric acid, potassium permanganate, ethanol, fructose.
Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.

Computing molecular weight (molecular mass)

To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2.

Definitions of molecular mass, molecular weight, molar mass and molar weight

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Weights of atoms and isotopes are from NIST article.
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What is the mass number of oxygen?

2 Answers

The most common Isotope Mass for Oxygen is 16 Atomic Mass Units.

Explanation:

The Weighted Average Atomic Mass for each element is found on the periodic table (That long decimal number near the bottom of each box). This number is a combination of all the known Isotopes and basically tells you the average mass you would expect per atom if you grabbed a random handful of them.

The Mass Number is the mass of a particular atom individually and is measured in Atomic Mass Units (AMU); these will always be whole numbers. Download gamecube emulator for mac. Dj mixer software for mac free download.

The most common Isotope is found by rounding the Weighted average found on the periodic table to the nearest whole number.

In this case Oxygen has a Weighted Average Atomic Mass of 15.999 AMU. So the Mass Number is 16.

Explanation:

Mass number#('A')# is the sum of the atomic number#'(Z')#, which is the number of protons, and neutrons #('N')# in the nucleus of a specific isotope of an element #('A=Z+N')#. Isotopes are named for their mass numbers. Oxygen has three naturally occurring isotopes.

The most common isotope of oxygen has 8 neutrons. Its atomic number is 8.

#'A=Z+N'#
#'A=8+8=16'#
This isotope of oxygen is oxygen-16. Adobe flash player download for mac safari.

Oxygen Atomic Mass And Number

Another isotope of oxygen has 9 neutrons.
#'A=8+9=17'#
This isotope is oxygen-17.