K Atomic Mass



Mass

Instant free online tool for Atomic mass unit to gram conversion or vice versa. The Atomic mass unit u to gram g conversion table and conversion steps are also listed. Also, explore tools to convert Atomic mass unit or gram to other weight and mass units or learn more about weight and mass conversions. The atomic mass of a particular atom is calculated from the sum of the mass of each isotope for that given element multiplied by its fractional abundance. Here is an excellent online periodic table, you will find it invaluable for answering your question and many other similar ones Dynamic Periodic Table Tip Click on the Ar and K boxes and the atomic mass is displayed in the bottom of the large box. 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.

Molar mass of K3N = 131.3016 g/mol

This compound is also known as Potassium Nitride.

Convert grams K3N to moles or moles K3N to grams

Molecular weight calculation:
39.0983*3 + 14.0067


What is c atomic mass
Symbol# of AtomsNitrogenN14.0067110.668%
PotassiumK39.0983389.332%



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.

Cached

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.

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.

Atomic

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.

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.

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.

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. Skype app store macbook.

Molar Mass, Molecular Weight and Elemental Composition Calculator

Atomic mass unit

Molar mass of KH2PO4 is 136.0855 g/mol
Convert between KH2PO4 weight and moles
CompoundMolesWeight, g
KH2PO4

Elemental composition of KH2PO4
ElementSymbolAtomic weightAtomsMass percent
PotassiumK39.0983128.7307
HydrogenH1.0079421.4813
PhosphorusP30.973762122.7605
OxygenO15.9994447.0275

Mass percent compositionAtomic percent composition

Sample reactions for KH2PO4
EquationReaction type
KOH + KH2PO4 = K3PO4 + H2Odouble replacement

Formula in Hill system is H2KO4P

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.
Give us feedback about your experience with Molecular Weight Calculator.
Related: Molecular weights of amino acids
molecular weights calculated today

Back to Online Chemical Tools Menu

K Atomic Number Mass Number

By using this website, you signify your acceptance of Terms and Conditions and Privacy Policy.
© 2021 webqc.org All rights reserved
Periodic table
Unit converters
Chemistry tools
Chemical Forum
Chemistry FAQ
Constants
Symmetry
Chemistry links
Link to us
Contact us


How to cite?

WebQC.Org
online education
free homework help
chemistry problems
questions and answers