SAT Subject Test Chemistry,10 edition

(Marvins-Underground-K-12) #1

Molality (m)


Molality    (m)
A concentration unit equal to the number of moles of solute per kilogram of solvent.

Molarity (M)


Molarity    (M)
A concentration unit equal to the number of moles of solute per liter of solution.

Molar mass


Molar   mass
The mass in grams of one mole of an element or compound.

Mole (mol)


Mole (mol)
One mole of a substance contains Avogadro’s number of molecules or atoms. The mass of one
mole of substance in grams is the same as the mass of one molecule or atom in atomic mass units.


Mole fraction (χ)


Mole fraction (χ)
A unit of concentration equal to the ratio of the number of moles of a particular component to
the total number of moles for all species in the system.


Molecular formula


Molecular   formula
A formula showing the actual number and identity of all atoms in each molecule of a compound.

Molecular weight

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