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Grain Science and Industry

Abbreviations and Terms

Symbol

Meaning

Definition

at. wt

atomic weight

a measure of the mass of a single atom of an element

c

concentration

the number of molecules of a substance in a given volume

concn, C

concentration

equiv

equivalent

the atomic weight of an element that has the same combining capacity as a given weight of another element

equiv wt

equivalent weight

the weight of an acid or a base containing 1 mole of replaceable H+ or OH-

fw

formula weight

the sum of the atomic weights of the atoms in an empirical formula

g

gram

the basic unit of weight of the metric system

L

liter

the basic unit of volume in the metric system

M

molatiry

the concentration of a solution in moles per litre

mol

mole

the basic unit of amount of substance

mol wt

molecular weight

The weight of 1 mole of a particular molecule

N

Normal (concentration)

?

N

Avogadro's number

The number of molecules contained in 1 mole of a substance defined as 6.033 x 1023

n

number of equivalents per mole

?

ppm

Parts Per Milion

?

sp gr

Specific Gravity

the ratio of the density of a substance to the density of water

V, vol

volume

the amount of 3-dimensional space occupied by an object

wt

weight

the vertical force exerted by a mass as a result of gravity

w/w

weight-to-weight ratio

?

w/v

weight-to-volume ratio

?

ρ

density

a measure of the amount of matter contained by a given volume

µ

micro

?

[ ]

molar concentration of substance in bracket

?