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en.wikipedia.org/wiki/Amount_of_substance

Amount of substance is a standards-defined quantity that measures the size of an ensemble of ... It has the unit symbol mol. ... Richter also notes that, for a given acid, the equivalent mass of the acid is proportional to the mass of ... hence of number of molecules in a given volume of gas, now known as the Loschmidt constant.

en.wikipedia.org/wiki/Mass

In physics, mass is a property of a physical body. It is the measure of an object's resistance to ... Thus, any stationary body having mass has an equivalent amount of energy, and ... mass measures the gravitational force exerted on an object in a known ... The mass of an object determines its acceleration in the presence of an  ...

www.reference.com/science/amount-matter-object-called-a74266d9d01ccabd

The amount of matter in an object is referred to as its mass. Although ... is expressed as a ratio of grams to volume, such as grams per cubic centimeter, or g/cm3.

How can you find the mass of an object if the volume is known but not the density ? Without knowing either the mass of an object or its density, it would be ...

www.quora.com/Physics-Density-is-defined-as-mass-per-unit-volume-but-others-say-that-its-the-amount-of-matter-that-composes-an-object-of-a-specific-volume-Which-of-the-two-definitions-is-it

Mass per unit volume is correct. The SI unit for mass is kilograms. SI unit for volume is m^3, ... Physics: Density is defined as "mass per unit volume," but others say that it's the amount of matter, that composes an object, of a specific volume. Which, of the two definitions, is it? UpdateCancel ...

slideplayer.com/slide/11022331

MASS Measurement of the amount of matter, or stuff, an object has ... of mass an object has per its volume Derived unit:g/mL Comes from units of mass per units ...

www.quora.com/If-mass-of-an-object-is-the-amount-of-substance-the-object-contains-then-what-does-the-term-amount-of-substance-mean-Does-it-mean-number-of-atoms

If mass of an object is the amount of substance the object contains then what ... According to Einstein's famous we know that mass is also a form of energy , which has been proved ... 1 kg is defined as mass of 1 cubic dm volume of water at its maximum ... What is the mass per unit volume of a substance?

www.nyu.edu/pages/mathmol/textbook/whatismatter.html

A nickel has the mass of about one gram. Objects that take up space and have mass are called matter. ... and other characteristics that can be seen without changing how that object looks are its physical properties. ... Density is the mass of a substance per unit volume. Volume is the amount of space an object occupies.