## Mole (unit) |

**Mole** is the

The measurement of Avogadro's number was refined in 2011 to ×10^{23} ± 6.02214078×10^{23}. 0.00000018^{[1]}

Scientists use this number because it is the number of

The number does not lend itself to easy expression in words. The nearest "casual" number is one million-million-million-million, which is 10^{24}.

Because different molecules and atoms do not have the same

- mathematics with the mole
- references

Moles = mass (g) / Relative mass (grams per mole) Example: How many moles are there in 20 grams of hydrogen? A value of 1 can be used for hydrogen's relative mass, although the correct value is slightly larger. So: moles = mass/relative mass = 20/1 = 20 moles.

Moles = concentration (mol/dm^{3}) x volume (dm^{3})
Example: How many moles are there in 100cm^{3} of 0.1M H_{2}SO_{4}?
1 dm^{3} is the same as 1000 cm^{3}, so the value in cubic centimetres needs to be divided by 1000. 100/1000 x 0.1 = 0.01 moles.

A

A mole can be thought of as two bags of different sized balls. One bag contains 3 tennis balls and the other 3 footballs. There is the same number of balls in both bags but the mass of the footballs is much larger. It is a different way to measure things. Moles measure the number of particles, not the mass. So both bags contain three moles.

A mole is simply a unit of the number of things. Other common units include a dozen, meaning 12, and a score, meaning 20. Similarly, a mole refers to a specific quantity-- its distinguishing feature is that its number is far larger than other common units. Such units are typically invented when existing units can not describe something easily enough. Chemical reactions typically take place between molecules of varying weights, meaning measurements of mass (such as grams) can be misleading when compared the reactions of individual molecules. On the other hand, using the absolute number of atoms/molecules/ions would also be confusing, as the massive numbers involved would make it all too easy to misplace a value or drop a digit. As such, working in moles allows scientists to refer to a specific quantity of molecules or atoms without resorting to excessively large numbers.

Other Languages

العربية: مول

অসমীয়া: ম'ল

asturianu: Mol

azərbaycanca: Mol

Bân-lâm-gú: Mol

беларуская: Моль

беларуская (тарашкевіца): Моль

български: Мол

བོད་ཡིག: མོལ།

bosanski: Mol (jedinica)

brezhoneg: Mol

català: Mol

Чӑвашла: Моль

čeština: Mol (jednotka)

Cymraeg: Môl (uned)

dansk: Mol (enhed)

Deutsch: Mol

eesti: Mool

Ελληνικά: Γραμμομόριο

English: Mole (unit)

español: Mol

Esperanto: Molaro (kemio)

euskara: Mol

فارسی: مول

français: Mole (unité)

Gaeilge: Mól

galego: Mol

한국어: 몰 (단위)

հայերեն: Մոլ

हिन्दी: मोल (इकाई)

hrvatski: Mol (mjerna jedinica)

Bahasa Indonesia: Mol

íslenska: Mól

italiano: Mole

עברית: מול

ಕನ್ನಡ: ಮೋಲ್

ქართული: მოლი

қазақша: Моль

Kreyòl ayisyen: Mòl

kurdî: Mol

Кыргызча: Моль

Latina: Moles (unitas)

latviešu: Mols

Lëtzebuergesch: Mol

lietuvių: Molis (vienetas)

Ligure: Mole

magyar: Mól

македонски: Мол

മലയാളം: മോൾ (യൂണിറ്റ്)

मराठी: मोल (एकक)

Bahasa Melayu: Mol

монгол: Моль

Nederlands: Mol (eenheid)

日本語: モル

Nordfriisk: Mol

norsk: Mol (enhet)

norsk nynorsk: Mol

occitan: Mòl (unitat)

ਪੰਜਾਬੀ: ਮੋਲ (ਇਕਾਈ)

پنجابی: مول

Piemontèis: Mòle

Plattdüütsch: Mol (Eenheit)

polski: Mol

português: Mol

română: Mol

русиньскый: Мол

русский: Моль

Scots: Mole (unit)

shqip: Moli

සිංහල: මවුලය

slovenčina: Mol (jednotka SI)

slovenščina: Mol (enota)

Soomaaliga: Mole

српски / srpski: Мол (јединица)

srpskohrvatski / српскохрватски: Mol (jedinica)

suomi: Mooli

svenska: Mol

Tagalog: Mole (yunit)

தமிழ்: மோல்

татарча/tatarça: Моль

ไทย: โมล

Türkçe: Mol (birim)

українська: Моль

اردو: مول (اکائی)

Tiếng Việt: Mol

文言: 摩爾

Winaray: Mol

粵語: 摩爾

中文: 摩尔 (单位)