# Molar mass of phosphorus

## Molecular weight of Phosphorus

Molar mass of P = 30.973761 g/mol

Convert grams Phosphorus to moles  or  moles Phosphorus to grams

 Element Symbol Atomic Mass # of Atoms Mass Percent Phosphorus P 30.973761 1 100.000%

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 atomic weights used on this site come from NIST, the National Institute of Standards and Technology. We use the most common isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.

Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.

Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights.

A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.

Sours: https://www.convertunits.com/molarmass/Phosphorus

### 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:
• Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
• Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
• parantesis () or brackets [].
• Common compound names.
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.

Related: Molecular weights of amino acids
Sours: https://www.webqc.org/molecular-weight-of-Phosphorus.html
Hint:This question gives the knowledge about the molecular formula and weight of the chemical compounds. The molecular formula is the way of representing the chemical compounds. The molar mass is the sum of masses of the individual elements.

The molar mass is the sum of masses of the individual elements.
The molar mass of phosphorus, ${P_4}$ is determined by summing up all the atoms of phosphorus present in this molecule. The molecular weight of one phosphorus is $31$. So, the molecular weight of phosphorus molecules is $124$.

Therefore, the molar mass of phosphorus, ${P_4}$ is $124g$.

Additional information: Allotropy is defined as the property by which chemical substances can be expressed in two or more differentiable forms having the same physical states. The allotropes of a substance differ only on the basis of bonding. The important example of allotrope is phosphorus. The allotropes of phosphorus are red phosphorus, black phosphorus and white phosphorus.
Pressure, light and temperature leads to changes in allotropic forms. Allotropes differ on the basis of their physical and chemical properties. Allotropy generally occurs in chemical species or chemical elements. They may exist in simpler or very complicated forms.
The allotropes of phosphorus are red phosphorus and white phosphorus. The reactions possesses by them are as follows:
The process of burning of white phosphorus in the presence of sufficient amounts of oxygen leads to the formation of phosphorus pentoxide. The reaction for process of preparation of phosphorus pentoxide is as follows:
${P_4} + 5{O_2} \to {P_4}{O_{10}}$
The process of burning phosphorus in the presence of sufficient amounts of oxygen leads to the formation of phosphorus trioxide at very low temperature. The reaction for process of preparation of phosphorus trioxide is as follows:
${P_4} + 3{O_2} \to {P_4}{O_6}$

Note:
You should have complete knowledge about the molecular formula is the way of representing the chemical compounds. It comprises the chemical symbols for the elements tailed by the numeric subscripts labelling the atoms of each element present in a molecule.
Calculate the mass per cent of calcium, phosphorus and oxygen in calcium phosp

## Phosphorus

IsotopeAtomic mass (Da)Isotopic abundance (amount fraction)
31P30.973 761 998(5)1

Phosphorus is a monoisotopic element and its atomic weight is determined solely by its isotope 31P. The Commission last revised the standard atomic weight of phosphorus in 2013 based on the latest Atomic Mass Evaluation by IUPAP.

32P and 33P are cosmogenic and also can be produced by the nuclear industry, but their concentrations in normal materials are too small to affect Ar(P).

CIAAW

Phosphorus
Ar(P) = 30.973 761 998(5) since 2013

The name derives from the Greek phosphoros for "bringing light" because it has the property of glowing in the dark. This was also the ancient name for the planet Venus, when it appears before sunrise. Phosphorus was discovered by the German merchant Hennig Brand in 1669.

Sours: https://ciaaw.org/phosphorus.htm

## Of phosphorus mass molar

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Molar Mass and Volume

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