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www.thoughtco.com/definition-of-formula-mass-605144

A related term you should know is relative formula mass (relative formula weight). This simply means the calculation is performed using relative atomic weight values for the elements, which are based on the natural isotopic ratio of elements found in Earth's atmosphere and crust.

www.britannica.com/science/formula-weight

Formula weight, in chemistry, the sum of the atomic weights of all atoms appearing in a given chemical formula. It is generally applied to a substance that does not consist of individual molecules, such as the ionic compound sodium chloride. Such a substance is customarily represented by a

www.merriam-webster.com/dictionary/formula weight

Formula weight definition is - molecular weight —used especially of ionic compounds.

www.dictionary.com/browse/formula-weight

Formula weight definition, (of a molecule) molecular weight. See more.

encyclopedia2.thefreedictionary.com/formula+weight

formula weight, in chemistry, a quantity computed by multiplying the atomic weight atomic weight, mean (weighted average) of the masses of all the naturally occurring isotopes of a chemical element, as contrasted with atomic mass, which is the mass of any individual isotope.

en.wikipedia.org/wiki/Weight

The most common definition of weight found in introductory physics textbooks defines weight as the force exerted on a body by gravity. This is often expressed in the formula W = mg, where W is the weight, m the mass of the object, and g gravitational acceleration.

medical-dictionary.thefreedictionary.com/formula+mass

mass [mas] 1. a lump or collection of cohering particles. 2. that characteristic of matter that gives it inertia. Symbol m. atomic mass atomic weight; see also atomic mass unit. inner cell mass an internal cluster of cells at the embryonic pole of the blastocyst which develops into the body of the embryo. lean body mass that part of the body including ...

en.wikipedia.org/wiki/Formula_weight

The molecular weight is very commonly used as a synonym of molar mass, particularly for molecular compounds; however, the most authoritative sources define it differently (see molecular mass). The formula weight is a synonym of molar mass that is frequently used for non-molecular compounds, such as ionic salts.

study.com/academy/lesson/what-is-molar-mass-definition-formula-examples.html

Compounds have mass, and this is what we call the molar mass. In this lesson, we will discuss the molar mass and go over examples on how to...

hyperphysics.phy-astr.gsu.edu/hbase/mass.html

Weight. The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton. For an object in free fall, so that gravity is the only force acting on it, then the expression for weight follows from Newton's ...