ଛାଞ୍ଚ:Chem molar mass/doc ନିମନ୍ତେ ଆଧାର ଦେଖିବେ

{{Documentation subpage}}
This template calculates the '''[[molecular mass]]''' (or molar mass) of a chemical compound. It is designed to be embedded in infoboxes {{tl|Infobox drug}} and {{tl|Chembox}}, but it can be used in-line just as well. 

== Parameters ==
Use '''chemical symbols''' to compose the molecular formula:
<code><nowiki>{{Chem molar mass|H=2|O=1}}</nowiki></code> (for {{Chem|H|2|O}}) &rarr; {{Chem molar mass|H=2|O=1}}

{{para|'''round'''}} by default the calculated number is rounded to 2 decimals.
:{{para|round|no}} will show all decimals: 
::<code><nowiki>{{Chem molar mass|Be=1|round=no}}</nowiki></code> &rarr; {{Chem molar mass|Be=1|round=no}}
:{{para|round|''a number''}} will round to that number of decimals
::<code><nowiki>{{Chem molar mass|Be=1|round=4}}</nowiki></code> &rarr; {{Chem molar mass|Be=1|round=4}}

{{para|'''unit'''}} changes the unit for the calculated result. The default unit is g·mol<sup>−1</sup>.
::<code><nowiki>{{Chem molar mass|H=2|O=1|unit=gram per mole}}</nowiki></code> &rarr; {{Chem molar mass|H=2|O=1|unit=gram per mole}}


The next parameters will always show:<br/>
{{para|'''fixed'''}} to enter a fixed (predefined) value+unit. It will overwrite any calculated value+unit.

{{para|'''ref'''|&lt;ref>some source</ref>}} will add the reference right after the unit.

{{para|'''comment'''|Any text}}is added as a suffix, after a space and unedited (no brackets added etc.).

Example:
:<code><nowiki>{{Chem molar mass|fixed=234.56 g/mol|ref=<ref>Some source</ref>|comment=My Comment}}</nowiki></code> &rarr; {{nowrap|1={{Chem molar mass|fixed=234.56 g/mol|ref=<ref>Some source</ref>|comment=My Comment}}}}

{{para|'''sortable'''|yes}}, for use in sortable tables: will add a hidden sortable number, and omits the unit (see table below).

== Blank parameter list ==
{| style="max-width:100%;"
|-
|
<pre>
{{Chem molar mass
| round   =
| unit    =
| fixed   =
| ref     =
| comment =
| sortable=
| catname =
}}
</pre>
|-
|
<pre>
{{Chem molar mass
<!-- 118 chemical symbols: -->|H= |He= |Li= |Be= |B= |C= |N= |O= |F= |Ne= |Na= |Mg= |Al= |Si= |P= |S= |Cl= |Ar= |K= |Ca= |Sc= |Ti= |V= |Cr= |Mn= |Fe= |Co= |Ni= |Cu= |Zn= |Ga= |Ge= |As= |Se= |Br= |Kr= |Rb= |Sr= |Y= |Zr= |Nb= |Mo= |Tc= |Ru= |Rh= |Pd= |Ag= |Cd= |In= |Sn= |Sb= |Te= |I= |Xe= |Cs= |Ba= |La= |Ce= |Pr= |Nd= |Pm= |Sm= |Eu= |Gd= |Tb= |Dy= |Ho= |Er= |Tm= |Yb= |Lu= |Hf= |Ta= |W= |Re= |Os= |Ir= |Pt= |Au= |Hg= |Tl= |Pb= |Bi= |Po= |At= |Rn= |Fr= |Ra= |Ac= |Th= |Pa= |U= |Np= |Pu= |Am= |Cm= |Bk= |Cf= |Es= |Fm= |Md= |No= |Lr= |Rf= |Db= |Sg= |Bh= |Hs= |Mt= |Ds= |Rg= |Uub= |Uut= |Lv= |Uup= |Fl= |Uus= |Uuo=
| round   =
| unit    =
| fixed   =
| ref     =
| comment =
| sortable=
| catname =
}}
</pre>
|}

==Standard atomic weights used==
{| class="wikitable sortable collapsible uncollapsed" style="width:100%;"
|- style="vertical-align:top;"
! Atomic&nbsp;number<br/>{{nobold|1=Z}}
! Element
! Molar&nbsp;mass<br/>{{nobold|1=g/mol}}
! Note
|-
! &nbsp;
!
!
!
|-
| 0 || {{chem|C|9|H|8|O|4}} || {{Chem molar mass|round=no|sortable=yes|fixed=180.157}} || fixed value input
|-
| 0 || {{chem|C|9|H|8|O|4}} || {{Chem molar mass|round=no|sortable=yes|fixed=180.157 g/mol}} || fixed value input
|-
| 0 || {{chem|C|9|H|8|O|4}} || {{Chem molar mass|round=no|sortable=yes|C=9|H=8|O=4}} || [[aspirin]]
|-
| 1 || H || {{Chem molar mass|round=no|sortable=yes|H=1}} ||
|-
| 2 || He || {{Chem molar mass|round=no|sortable=yes|He=1}} ||
|-
| 3 || Li || {{Chem molar mass|round=no|sortable=yes|Li=1}} ||
|-
| 4 || Be || {{Chem molar mass|round=no|sortable=yes|Be=1}} ||
|-
| 5 || B || {{Chem molar mass|round=no|sortable=yes|B=1}} ||
|-
| 6 || C || {{Chem molar mass|round=no|sortable=yes|C=1}} ||
|-
| 7 || N || {{Chem molar mass|round=no|sortable=yes|N=1}} ||
|-
| 8 || O || {{Chem molar mass|round=no|sortable=yes|O=1}} ||
|-
| 9 || F || {{Chem molar mass|round=no|sortable=yes|F=1}} ||
|-
| 10 || Ne || {{Chem molar mass|round=no|sortable=yes|Ne=1}} ||
|-
| 11 || Na || {{Chem molar mass|round=no|sortable=yes|Na=1}} ||
|-
| 12 || Mg || {{Chem molar mass|round=no|sortable=yes|Mg=1}} ||
|-
| 13 || Al || {{Chem molar mass|round=no|sortable=yes|Al=1}} ||
|-
| 14 || Si || {{Chem molar mass|round=no|sortable=yes|Si=1}} ||
|-
| 15 || P || {{Chem molar mass|round=no|sortable=yes|P=1}} ||
|-
| 16 || S || {{Chem molar mass|round=no|sortable=yes|S=1}} ||
|-
| 17 || Cl || {{Chem molar mass|round=no|sortable=yes|Cl=1}} ||
|-
| 18 || Ar || {{Chem molar mass|round=no|sortable=yes|Ar=1}} ||
|-
| 19 || K || {{Chem molar mass|round=no|sortable=yes|K=1}} ||
|-
| 20 || Ca || {{Chem molar mass|round=no|sortable=yes|Ca=1}} ||
|-
| 21 || Sc || {{Chem molar mass|round=no|sortable=yes|Sc=1}} ||
|-
| 22 || Ti || {{Chem molar mass|round=no|sortable=yes|Ti=1}} ||
|-
| 23 || V || {{Chem molar mass|round=no|sortable=yes|V=1}} ||
|-
| 24 || Cr || {{Chem molar mass|round=no|sortable=yes|Cr=1}} ||
|-
| 25 || Mn || {{Chem molar mass|round=no|sortable=yes|Mn=1}} ||
|-
| 26 || Fe || {{Chem molar mass|round=no|sortable=yes|Fe=1}} ||
|-
| 27 || Co || {{Chem molar mass|round=no|sortable=yes|Co=1}} ||
|-
| 28 || Ni || {{Chem molar mass|round=no|sortable=yes|Ni=1}} ||
|-
| 29 || Cu || {{Chem molar mass|round=no|sortable=yes|Cu=1}} ||
|-
| 30 || Zn || {{Chem molar mass|round=no|sortable=yes|Zn=1}} ||
|-
| 31 || Ga || {{Chem molar mass|round=no|sortable=yes|Ga=1}} ||
|-
| 32 || Ge || {{Chem molar mass|round=no|sortable=yes|Ge=1}} ||
|-
| 33 || As || {{Chem molar mass|round=no|sortable=yes|As=1}} ||
|-
| 34 || Se || {{Chem molar mass|round=no|sortable=yes|Se=1}} ||
|-
| 35 || Br || {{Chem molar mass|round=no|sortable=yes|Br=1}} ||
|-
| 36 || Kr || {{Chem molar mass|round=no|sortable=yes|Kr=1}} ||
|-
| 37 || Rb || {{Chem molar mass|round=no|sortable=yes|Rb=1}} ||
|-
| 38 || Sr || {{Chem molar mass|round=no|sortable=yes|Sr=1}} ||
|-
| 39 || Y || {{Chem molar mass|round=no|sortable=yes|Y=1}} ||
|-
| 40 || Zr || {{Chem molar mass|round=no|sortable=yes|Zr=1}} ||
|-
| 41 || Nb || {{Chem molar mass|round=no|sortable=yes|Nb=1}} ||
|-
| 42 || Mo || {{Chem molar mass|round=no|sortable=yes|Mo=1}} ||
|-
| 43 || Tc || {{Chem molar mass|round=no|sortable=yes|Tc=1}} ||
|-
| 44 || Ru || {{Chem molar mass|round=no|sortable=yes|Ru=1}} ||
|-
| 45 || Rh || {{Chem molar mass|round=no|sortable=yes|Rh=1}} ||
|-
| 46 || Pd || {{Chem molar mass|round=no|sortable=yes|Pd=1}} ||
|-
| 47 || Ag || {{Chem molar mass|round=no|sortable=yes|Ag=1}} ||
|-
| 48 || Cd || {{Chem molar mass|round=no|sortable=yes|Cd=1}} ||
|-
| 49 || In || {{Chem molar mass|round=no|sortable=yes|In=1}} ||
|-
| 50 || Sn || {{Chem molar mass|round=no|sortable=yes|Sn=1}} ||
|-
| 51 || Sb || {{Chem molar mass|round=no|sortable=yes|Sb=1}} ||
|-
| 52 || Te || {{Chem molar mass|round=no|sortable=yes|Te=1}} || {{nowrap|1=(Does not follow atomic number)}}
|-
| 53 || I || {{Chem molar mass|round=no|sortable=yes|I=1}} || {{nowrap|1=(Does not follow atomic number)}}
|-
| 54 || Xe || {{Chem molar mass|round=no|sortable=yes|Xe=1}} ||
|-
| 55 || Cs || {{Chem molar mass|round=no|sortable=yes|Cs=1}} ||
|-
| 56 || Ba || {{Chem molar mass|round=no|sortable=yes|Ba=1}} ||
|-
| 57 || La || {{Chem molar mass|round=no|sortable=yes|La=1}} ||
|-
| 58 || Ce || {{Chem molar mass|round=no|sortable=yes|Ce=1}} ||
|-
| 59 || Pr || {{Chem molar mass|round=no|sortable=yes|Pr=1}} ||
|-
| 60 || Nd || {{Chem molar mass|round=no|sortable=yes|Nd=1}} ||
|-
| 61 || Pm || {{Chem molar mass|round=no|sortable=yes|Pm=1}} ||
|-
| 62 || Sm || {{Chem molar mass|round=no|sortable=yes|Sm=1}} ||
|-
| 63 || Eu || {{Chem molar mass|round=no|sortable=yes|Eu=1}} ||
|-
| 64 || Gd || {{Chem molar mass|round=no|sortable=yes|Gd=1}} ||
|-
| 65 || Tb || {{Chem molar mass|round=no|sortable=yes|Tb=1}} ||
|-
| 66 || Dy || {{Chem molar mass|round=no|sortable=yes|Dy=1}} ||
|-
| 67 || Ho || {{Chem molar mass|round=no|sortable=yes|Ho=1}} ||
|-
| 68 || Er || {{Chem molar mass|round=no|sortable=yes|Er=1}} ||
|-
| 69 || Tm || {{Chem molar mass|round=no|sortable=yes|Tm=1}} ||
|-
| 70 || Yb || {{Chem molar mass|round=no|sortable=yes|Yb=1}} ||
|-
| 71 || Lu || {{Chem molar mass|round=no|sortable=yes|Lu=1}} ||
|-
| 72 || Hf || {{Chem molar mass|round=no|sortable=yes|Hf=1}} ||
|-
| 73 || Ta || {{Chem molar mass|round=no|sortable=yes|Ta=1}} ||
|-
| 74 || W || {{Chem molar mass|round=no|sortable=yes|W=1}} ||
|-
| 75 || Re || {{Chem molar mass|round=no|sortable=yes|Re=1}} ||
|-
| 76 || Os || {{Chem molar mass|round=no|sortable=yes|Os=1}} ||
|-
| 77 || Ir || {{Chem molar mass|round=no|sortable=yes|Ir=1}} ||
|-
| 78 || Pt || {{Chem molar mass|round=no|sortable=yes|Pt=1}} ||
|-
| 79 || Au || {{Chem molar mass|round=no|sortable=yes|Au=1}} ||
|-
| 80 || Hg || {{Chem molar mass|round=no|sortable=yes|Hg=1}} ||
|-
| 81 || Tl || {{Chem molar mass|round=no|sortable=yes|Tl=1}} ||
|-
| 82 || Pb || {{Chem molar mass|round=no|sortable=yes|Pb=1}} ||
|-
| 83 || Bi || {{Chem molar mass|round=no|sortable=yes|Bi=1}} ||
|-
| 84 || Po || {{Chem molar mass|round=no|sortable=yes|Po=1}} ||
|-
| 85 || At || {{Chem molar mass|round=no|sortable=yes|At=1}} ||
|-
| 86 || Rn || {{Chem molar mass|round=no|sortable=yes|Rn=1}} ||
|-
| 87 || Fr || {{Chem molar mass|round=no|sortable=yes|Fr=1}} ||
|-
| 88 || Ra || {{Chem molar mass|round=no|sortable=yes|Ra=1}} ||
|-
| 89 || Ac || {{Chem molar mass|round=no|sortable=yes|Ac=1}} ||
|-
| 90 || Th || {{Chem molar mass|round=no|sortable=yes|Th=1}} ||
|-
| 91 || Pa || {{Chem molar mass|round=no|sortable=yes|Pa=1}} ||
|-
| 92 || U || {{Chem molar mass|round=no|sortable=yes|U=1}} ||
|-
| 93 || Np || {{Chem molar mass|round=no|sortable=yes|Np=1}} ||
|-
| 94 || Pu || {{Chem molar mass|round=no|sortable=yes|Pu=1}} ||
|-
| 95 || Am || {{Chem molar mass|round=no|sortable=yes|Am=1}} ||
|-
| 96 || Cm || {{Chem molar mass|round=no|sortable=yes|Cm=1}} ||
|-
| 97 || Bk || {{Chem molar mass|round=no|sortable=yes|Bk=1}} ||
|-
| 98 || Cf || {{Chem molar mass|round=no|sortable=yes|Cf=1}} ||
|-
| 99 || Es || {{Chem molar mass|round=no|sortable=yes|Es=1}} ||
|-
| 100 || Fm || {{Chem molar mass|round=no|sortable=yes|Fm=1}} ||
|-
| 101 || Md || {{Chem molar mass|round=no|sortable=yes|Md=1}} ||
|-
| 102 || No || {{Chem molar mass|round=no|sortable=yes|No=1}} ||
|-
| 103 || Lr || {{Chem molar mass|round=no|sortable=yes|Lr=1}} ||
|-
| 104 || Rf || {{Chem molar mass|round=no|sortable=yes|Rf=1}} ||
|-
| 105 || Db || {{Chem molar mass|round=no|sortable=yes|Db=1}} ||
|-
| 106 || Sg || {{Chem molar mass|round=no|sortable=yes|Sg=1}} ||
|-
| 107 || Bh || {{Chem molar mass|round=no|sortable=yes|Bh=1}} ||
|-
| 108 || Hs || {{Chem molar mass|round=no|sortable=yes|Hs=1}} ||
|-
| 109 || Mt || {{Chem molar mass|round=no|sortable=yes|Mt=1}} ||
|-
| 110 || Ds || {{Chem molar mass|round=no|sortable=yes|Ds=1}} ||
|-
| 111 || Rg || {{Chem molar mass|round=no|sortable=yes|Rg=1}} ||
|-
| 112 || Cn || {{Chem molar mass|round=no|sortable=yes|Cn=1}} ||
|-
| 113 || Uut || {{Chem molar mass|round=no|sortable=yes|Uut=1}} ||
|-
| 114 || Fl || {{Chem molar mass|round=no|sortable=yes|Fl=1}} ||
|-
| 115 || Uup || {{Chem molar mass|round=no|sortable=yes|Uup=1}} ||
|-
| 116 || Lv || {{Chem molar mass|round=no|sortable=yes|Lv=1}} ||
|-
| 117 || Uus || {{Chem molar mass|round=no|sortable=yes|Uus=1}} ||
|-
| 118 || Uuo || {{Chem molar mass|round=no|sortable=yes|Uuo=1}} ||
|}

===Data sources (CIAAW) ===
Primarily, the atomic weights used here are defined by [[CIAAW]] [http://www.ciaaw.org/publications.htm]:
* {{cite web|title=Standard Atomic Weights|url=http://www.ciaaw.org/atomic-weights.htm|author=|date=2015|accessdate=2015-09-20|publisher=[[Commission on Isotopic Abundances and Atomic Weights]] (CIAAW)}} (68 elements)
* CIAAW also published additional lists in spreadsheet format (2013). It has additional ''conventional values'' for trade usage (12 elements), and some background information on the numbers and calculations.
:{{cite web|title=Atomic weights of the elements 2013 (xls) |url=http://www.ciaaw.org/publications.htm |first1=T.B.|last1=Coplen|first2=W.A.|last2=Brand|displayauthors=1|date=2013 |accessdate=2015-05-26|publisher=CIAAW}}
* Some unstable elements can naturally occur, and so are listed (4 elements: Bi, Th, Pa, U)
* Additional values are those of the most stable isotopes, as given in [[List of chemical elements]] (34 elements). This source is not supported by the CIAAW publications.

==Embedding in a template==
The template is designed to be embedded in a template like {{tl|Drugbox}}. The molecular formula can be entered like <code>...|H=2|O=1</code>, and these values then are passed through to this subtemplate, together with the other parameters like <code>|round=</code>.

For this usage one extra parameter is available:<br/>
{{para|'''catname'''}}. A category name entered here, which will be used as ''maintenance category'' for articles that have both ''calculated'' and ''fixed'' input. These are two inputs for one data value. The maintenance task is to remove the {{para|fixed}} input (unless overwriting is intentional).

==Know issue: uncertainty==
Atomic weights are given with a precision and uncertainty, for example: 20.1797(6) for [[neon]] (more [[Molar_mass#Precision_and_uncertainties|here]]).

;Uncertainty
This template does not maintain the uncertainty (the bracketed part). When done correctly, the uncertainty could influence the result, especially when precision (number of decimals) is larger. 

;Rounding
This template usually does rounding on the calculated result, to 2 decimals by default:
:For neon: <nowiki>{{Chem molar mass|Ne=1}}</nowiki> &rarr; {{Chem molar mass|Ne=1}} 
Two decimals is common practice for trade and most laboratory situations. However, rounding is set to more decimals, and the compounnd has atoms with ''less precision'', the resulting number will be inaccurate (suggesting a wrong precision). For example [[strontium]] :
:<nowiki>{{Chem molar mass|Sr=1|round=4}}</nowiki> &rarr; {{Chem molar mass|Sr=1|round=4}} 

Six elements have values ending with a final decimal being "0" (a zero), like Sn: 118.710. This value does not show for technical reasons (the calculation 'rounds them away'), but it does signify an extra precision. The six elements are Sn, Rh, Ge, Sb, Dy, Bi.

===Calculate cumulative uncertainties===
* [http://www.rit.edu/~w-uphysi/uncertainties/Uncertaintiespart2.html], [http://ipl.physics.harvard.edu/wp-uploads/2013/03/PS3_Error_Propagation_sp13.pdf]

==See also==
* {{cl|Chemical articles having calculated molecular weight overwritten}}
* {{tl|Chem molar mass/format}}
* {{tl|Chem}} (formula)
<includeonly>{{#ifeq:{{SUBPAGENAME}}|sandbox | |
<!-- Categories below this line, please; interwikis at Wikidata -->
[[Category:Templates used in Infobox drug|Molar mass]]
[[Category:Templates used in Chembox|Molar mass]]
}}</includeonly>