Molar mass of silver chloride (AgCl)

The molar mass of silver chloride (AgCl) is 143.3182 g/mol, summed from the IUPAC standard atomic weights of Ag, Cl.

Mass of sample

Amount of substance

mol

Molar mass

143.3182g/mol

= Exact Molar mass of silver chloride

Moles in the sample mass: 0.069 774 809 mol
Mass of that amount of substance: 143.3182
Molecules in the sample mass: 4.20194e+22

Show the working

Mass of sample = 10
Amount of substance = 1
Molar mass = 107.8682 + 35.45 = 143.318
Moles in the sample mass = 10 / 143.318 = 0.069 774 8
Mass of that amount of substance = 1 * 143.318 = 143.318
Molecules in the sample mass = 0.069 774 8 * NA = 4.20194e+22

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 AgCl: 107.8682 + 35.45 = 143.3182 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
Silver (Ag)	1	107.8682	107.8682	75.265 %
Chlorine (Cl)	1	35.45	35.45	24.735 %

Contributions add to the molar mass of 143.3182 g/mol. Atomic weights are the IUPAC 2021 standard values.

Frequently asked

What is the molar mass of silver chloride?

143.3182 g/mol, for the formula AgCl.

How do you convert grams of silver chloride to moles?

Divide the mass in grams by 143.3182 g/mol. One gram of silver chloride is 0.00697748 mol.

How many grams are in one mole of silver chloride?

143.3182 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.