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Molar mass of sodium fluoride (NaF)

The molar mass of sodium fluoride (NaF) is 41.9881724 g/mol, summed from the IUPAC standard atomic weights of Na, F.

mol
Molar mass
41.988 172 4g/mol
= Exact Molar mass of sodium fluoride
Moles in the sample mass
0.238 162 31 mol
Mass of that amount of substance
41.988 172
Molecules in the sample mass
1.43425e+23
Show the working
  1. Mass of sample = 10
  2. Amount of substance = 1
  3. Molar mass = 22.98976928 + 18.998403162 = 41.9882
  4. Moles in the sample mass = 10 / 41.9882 = 0.238 162
  5. Mass of that amount of substance = 1 * 41.9882 = 41.9882
  6. Molecules in the sample mass = 0.238 162 * NA = 1.43425e+23

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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    The formula

    • Molar mass = sum over elements of (atomic weight x number of atoms)
    • For NaF: 22.98976928 + 18.998403162 = 41.9881724 g/mol
    • Moles = mass / molar mass; mass = moles x molar mass
    • Molecules = moles x 6.02214076 x 10^23 (the Avogadro constant, exact by definition)

    Molar mass in grams per mole is numerically equal to the molecular mass in daltons, so this figure doubles as the molecular weight.

    Atomic weights are the IUPAC 2021 standard values. Several elements have a range rather than a single value because isotope ratios vary between sources; the conventional single value is used here.

    Composition by mass

    Element Atoms Atomic weight Contribution (g/mol) Share of mass
    Sodium (Na) 122.9897692822.98976954.753 %
    Fluorine (F) 118.99840316218.99840345.247 %

    Contributions add to the molar mass of 41.9881724 g/mol. Atomic weights are the IUPAC 2021 standard values.

    Frequently asked

    What is the molar mass of sodium fluoride?

    41.9881724 g/mol, for the formula NaF.

    How do you convert grams of sodium fluoride to moles?

    Divide the mass in grams by 41.9881724 g/mol. One gram of sodium fluoride is 0.0238162 mol.

    How many grams are in one mole of sodium fluoride?

    41.9881724 g, by definition of the molar mass.

    Is molar mass the same as molecular weight?

    Numerically yes, for the purposes of this calculation. Molecular weight is a dimensionless ratio and molar mass carries units of g/mol, but the digits are identical.

    Where the numbers come from

    • IUPAC 2021 standard atomic weights; Avogadro constant fixed by the 2019 SI.

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