Question

What is the instrument used to measure amount of substance?

Answer 1

The word stoichiometry is a technical chemical term derived from the two Greek roots stoicheion, "element", and metron, "measure". Chemical stoichiometry is the area of chemistry which deals with the quantitative relationships between numbers of atoms involved in matter. Since very large numbers of atoms are needed to make up real objects which we can conveniently handle, the unit of amount of substance contains a large number of atoms. That unit of amount of substance is called the mole.

The mole is the SI unit for amount of substance. It is defined as a number - that number of atoms which exists in exactly twelve grams of the isotope of carbon of isotopic mass twelve. For historical reasons this number is known as the Avogadro number; its symbol is NA. Although the Avogadro number is very large, it can be measured with high precision; the currently accepted value is 6.0221367(36) x 10+23 entities/mole.

Answer 2

A tool used to measure a physical quantum is called a measuring instrument.

• Dimension is the process of gathering and comparing physical amounts of factual effects and events in the physical lores, quality control, and engineering.
• The process of measuring yields a number associating the subject under study and the substantiated unit of dimension, and established standard objects and circumstances are employed as units.
• These numerical connections are achieved by the use of measuring bias and formally defined test procedures.
• There are different situations of instrument error and dimension query for every measuring device.
• These tools might be anything from standard tools like sundials and autocrats to electron microscopes and flyspeck accelerators. ultramodern measuring instrument development makes expansive use of virtual instrumentation.

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